Editing Riku

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{{cleanup|KH3 section contains some speculation and script-regurgitation; add kh3d-tower/kh0.2 model}}

  |game5=Kingdom Hearts Birth by Sleep

  |game6=Kingdom Hearts coded

|journalUX='''KH Riku/Illustrated Riku'''<br>KINGDOM HEARTS (2002)<br>A childhood friend of Sora and Kairi.<br><br>'''KH II Black Coat Riku A/KH II Black Coat Riku B'''<br>KINGDOM HEARTS II (2005)<br>A childhood friend of Sora and Kairi who's fought Sora in the past.<br><br>'''KH II Riku'''<br>KINGDOM HEARTS II (2005)<br>A childhood friend of Sora and Kairi. Reliable and inquisitive.<br><br>'''KH CoM Black Coat Riku'''<br>KINGDOM HEARTS CoM (2004)<br>A childhood friend of Sora who struggles with the darkness inside.<br><br>'''Illustrated Riku B'''<br>KINGDOM HEARTS CoM (2004)<br>A childhood friend of Sora and Kairi. He dreamed of going off to the outside world.<br><br>'''KH 3D Riku'''<br>KINGDOM HEARTS 3D (2012)<br>A Keyblade-wielding boy who takes on the Mark of Mastery exam.<br><br>'''HD Riku'''<br>KINGDOM HEARTS 3D (2012)<br>A young Keyblade wielder who attempts the Mark of Mastery exam to test his potential.<br><br>'''Sora & Riku & Kairi'''<br>KINGDOM HEARTS (2002)<br>Three friends who live in Destiny Islands.<br><br>'''Sora & Riku & Meow Wow'''<br>KINGDOM HEARTS 3D (2012)<br>A Medal celebrating KH 2.8.

'''Riku''' is one of the main characters in the ''{{c|Kingdom Hearts|series}}'' series. He is a major playable character in ''[[Kingdom Hearts Chain of Memories]]'' and ''[[Kingdom Hearts 3D: Dream Drop Distance]]''. He has lesser playable roles in ''[[Kingdom Hearts II]]'' and ''[[Kingdom Hearts III]]'', only for minor battles. In ''[[Kingdom Hearts 358/2 Days]]'', he is playable in [[Mission Mode]].

One night, there is a meteor shower and Kairi appears on the islands from [[Radiant Garden]], another world far off from Destiny Islands. Riku, Sora, and Kairi quickly forge a powerful friendship. Soon after Kairi's arrival, Riku and Sora go to the secret place, a small cave that they frequently explored. While there, the two spot a mysterious door, though neither one can find a way to open it. The two decide to leave, but Riku manages to get a glimpse of Destiny Islands' Keyhole.

[[File:The Outside World 01 KH.png|thumb|right|Riku, Sora, and Kairi often spend the evenings at a tree on an attached islet.]]

Riku, Sora, and Kairi continued to live on the Destiny Islands together. The three work together to construct a [[Highwind (raft)|raft]] and gather supplies so that they can set out and search for other outside worlds. While Riku and Sora continue their rivalry through duels and races, Riku takes jabs at Sora over his relationship with Kairi, telling him that if Sora does not share a [[paopu fruit]] with Kairi soon, he will.

During Sora and Aladdin's fight with Jafar in [[Agrabah]], Riku takes [[Jasmine]] to Hollow Bastion under Maleficent's orders. Maleficent reveals the whereabouts of Kairi's body. She claims that the only way to save Kairi, who appears to have lost her heart to the darkness, is to gain access to [[Kingdom Hearts]].

[[File:Shadow Sora 02 KH.png|thumb|right|Riku retreats with Kairi and summons AntiSora to battle Sora.]]

At Hollow Bastion, Sora again meets Riku, stopping him from taking down the wounded [[Beast]]. Riku and Sora briefly talk then forcibly summons the Keyblade away from him, telling him that he was "just the delivery boy" and that Riku is the true Keyblade master. After leaving Sora with the [[Wooden Sword|toy sword]] he used on Destiny Islands, he departs, and Donald and Goofy reluctantly follow him as per [[Mickey Mouse|The King]]'s orders.

Riku, defeated, manages to escape, but he is confused as to why Sora was able to regain the Keyblade. A [[Ansem, Seeker of Darkness|cloaked figure]] appears to him from the Darkness, telling him that only one with a stronger heart can claim the Keyblade, and Riku's was weaker than Sora. However, the figure tells him that plunging himself into darkness will make his heart stronger. Riku does so, and he is possessed by the dark figure.

The possessed Riku then comes before Maleficent, and warns her of the dangers of unlocking the [[Final Keyhole]]. When she claims not to be afraid, Riku shows a new, [[Keyblade of heart|dark Keyblade]] created with six of the seven princesses' hearts. However, it doesn't react to the Keyhole. Realizing it is still needing Kairi's heart to be complete, Maleficent heads off to handle Sora and company. After Maleficent is defeated by Sora, Riku appears with his Keyblade and explains that unlike Sora's Keyblade, this Keyblade possesses the ability to unlock a person's heart, and Riku demonstrates this by piercing Maleficent's chest, allowing the immense darkness that is attracted to her to overtake her heart, transforming her into a giant dragon. When Maleficent is defeated again, he reappears, commenting on how Maleficent was being used by the Heartless from the start before disappearing again.

[[File:The Seeker of Darkness 01 KH.png|thumb|left|Ansem possessing Riku's body.]]

[[Game:Riku|Riku]], declaring himself to be Ansem, the Seeker of Darkness, confronts Sora in the Grand Hall and reveals that Sora has Kairi's heart in his body. While Donald and Goofy look on, Riku and Sora clash again, with Ansem's presence amplifying Riku's dark powers. He fades away when he is defeated, but after Sora impales himself with the Keyblade to release Kairi's heart and disappears, Ansem reveals himself and attacks Kairi, Donald, and Goofy. Riku uses the last of his strength to hold back his possessor, and yells to the others to run. After they leave, Riku and Ansem are pulled into the darkness coming from the Final Keyhole.

[[File:Closing the Door 04 KH.png|thumb|right|Riku tells Sora to take care of Kairi before the Door to Darkness is closed.]]

After Ansem's defeat, Riku is restored in the Realm of Darkness, but is quickly targeted by a massive swarm of Heartless. Fortunately, Aqua and Mickey spot him, and Aqua uses her Keyblade to restrain the Heartless, unobserved by the boy, allowing Mickey and Riku to escape.{{storylink|Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-}}

Riku awakens in the Realm of Darkness. An unseen presence gifts him a magic world card and asks him to choose between slipping back into slumber, or taking the card and making his way toward the truth. Riku decides that going back to sleep would be boring, and confidently takes the card.<!--KH3d seems to claim he wakes in the Realm Between: "Meanwhile, Riku had found his way out of the realm between light and darkness."-->

Riku leaves Hollow Bastion, only to see the true form of Castle Oblivion. The voice again comes to Riku, but this time reveals himself to be Ansem, who wants to take over Riku again. However, though Ansem is powerful, King Mickey comes to aid Riku with his light. Riku then manages to fend off Ansem for the time being. Before he departs, the Heartless leaves Riku with some world cards and the ability to wield his inner darkness as a weapon.

To further the trio's goals, Vexen independently appears before Riku and the latter wonders if Vexen is with "Ansem" (Xehanort's Heartless). Vexen cryptically responds that he is with "[[Xemnas|another Ansem]]". Still, Riku fights against Vexen, seeing him as an enemy. However, the battle only helps Vexen, who uses the data he gathered from the battle to create a [[Riku Replica|replica of Riku]]. The replica soon comes to battle Riku, mocking Riku's fear of the darkness while the replica embraces it. However, the real Riku proves victorious, and the replica runs off. Soon, Ansem, Seeker of Darkness, appears again, saying that the replica is a model of what Riku should be, but Riku only reaffirms his desire to conquer his darkness.

[[File:In a Flash of Darkness 01 KHRECOM.png|thumb|right|Ansem possesses Riku for an instance and eliminates Lexaeus.]]

In Destiny Islands, Riku meets all of his friends, but they are all silent and they eventually disappear, even Kairi. Zexion throws all of Riku's fears at him at once, telling him he's responsible for causing them to disappear, and that he belongs to the darkness now. He finally transforms an illusion of him into a Darkside Heartless, telling him this is what he has become. Riku defeats the Heartless as Zexion disguises himself as Sora. He tells him that it's finally time to face the light.

Riku sinks into the light as he begins to fade, but [[Naminé]] appears in the form of Kairi and tells him that he can't fade, because light can't destroy him, and neither can darkness, so he should accept both to drive away his fears. He awakens his dark powers again, admitting that it's a part of him and not evil, defeating Zexion. Zexion disappears, but is quickly eliminated by the Riku Replica with Axel.

Riku uses the card, and ends up in Twilight Town. Ansem, Seeker of Darkness, appears again, but Riku tells him that he is not "Ansem", because his scent is not darkness—but rather something else. Riku also sees that this man is the voice that presented itself at the beginning of his journey. The voice finally appears and introduces himself as [[Ansem the Wise|DiZ]]. Riku asks him what he really wants from him, and DiZ tells him he wants him to choose between light and darkness, because he lies in-between. The decision will be decided with Naminé, whom Riku looks for. However, the Riku Replica manages to find him, and demands another fight to prove him "worthy". The replica intends to destroy Riku in order to become real, but fails. However, Riku comforts him by saying that the replica's heart will go to the same place as the real one's, before the replica vanishes out of existence.

[[File:Where the Road Leads 01 KHRECOM.png|thumb|right|Riku walking the road to dawn.]]

Riku and Mickey wait at the crossroads. Riku tells him that he can't go home yet, as Ansem's shadow still lingers in him, but Mickey says the darkness is a part of him. Riku, who now forms an equally strong bond to the King as Sora's friendship to Donald and Goofy, calls Mickey by his name at the King's request. They leave, taking Organization coats that DiZ gave them prior to confronting Ansem, and DiZ appears for one final question: if he shall take the "road to light" or the "road to darkness". Riku chooses neither; he instead chooses to take the middle road, "the road to dawn".

|In the [[Kingdom Hearts 358/2 Days (manga)|manga]], Riku sees Xion as Kairi.

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[[File:Disorder 01 KHD.png|thumb|right|Riku tells Xion she has to come up with a solution which works best for her and everybody else.]]

[[File:Truth 01 KHD.png|thumb|left|Riku ask Mickey to protect and guide Sora, Donald, and Goofy upon their awakening.]]

In [[The Woods]], King Mickey runs across Riku-Ansem and prepares to attack, supposing him to be Xehanort's Heartless, but calms himself when Riku replaces his blindfold and returns to his normal form. Riku informs the King that he is leaving to fight a member of the Organization, and asks Mickey to protect Sora in the event that he does not return.

[[File:The Beginning of Everything 01 KHIIFM.png|thumb|right|Riku gives in to his darkness in a last-ditch effort to take out Roxas.]]

Riku returns the Oblivion to the unconscious Roxas and prepares to transport him, but is surprised when Roxas revives and once again attacks; in response, Riku jostles his sleeping memories by taunting Roxas as he once did Sora, inducing Roxas to respond as Sora would and confirming Riku's suspicions of Roxas: that he is Sora's Nobody. Even more enraged, Roxas slashes at Riku with the Oblivion and it passes on one final memory of Xion, which implore Riku to save Roxas by stopping him. Left with no other choice, Riku releases the darkness imprisoned in his heart and takes on Ansem's form permanently. Riku realizes that if he is to win in the Realm of Darkness, he must submerse himself in the same darkness. He quickly dispatches Roxas, then returns him to DiZ's base at the Old Mansion, where he introduces himself as "Ansem".

Riku continues to ally himself with DiZ, as they have a common goal: to help Sora awaken (though Riku finds his memories of Sora fading, being a side-effect of Naminé's toying with Sora's memories). Roxas's memory is erased by DiZ and he is placed into a [[Simulated Twilight Town]], to live out his days until the time comes for him to meet Sora. Meanwhile, Riku watches over Roxas, periodically entering the town in order to keep Roxas ignorant to the truth, including keeping Naminé from saying anything important to Roxas. He also takes some keepsakes of Roxas's during some of his visits. With all these deeds done, Riku finally demands to know what DiZ's true objective is. Upon hearing that it is merely revenge (DiZ does not disclose against whom it is), Riku clenches his fist, shocked and disgusted at how DiZ is merely using him and Sora for his own selfish reasons.

[[File:The Man Who Stands on the Snowy Mountain 01 KHII.png|thumb|right|200px|A hooded Riku confronts Sora in The Land of Dragons.]]

Riku also arrives at [[The Land of Dragons]], trying to warn the Emperor of a Heartless dragon that [[Xigbar]] had created. However, he ends up meeting Sora, and Sora attacks him, thinking Riku to be an Organization member. When Sora sees that Riku is wielding the Soul Eater, he begins to suspect Riku's identity. Advancing forward, Riku still goes ahead with his mission and warns the Emperor, but had to defeat [[Li Shang]] in order to do so. When Sora talks to the Emperor, the wise ruler's description of the man further cemented Sora's idea that the man he fought was Riku; though unaware of why he is wearing the coat, Sora is nonetheless relieved to know that Riku is safe.

Upon learning that the Organization had kidnapped Kairi to force Sora to slay Heartless for them, Riku heads to the [[Castle That Never Was]] and protects Naminé and Kairi from [[Saïx]] after Naminé has freed Kairi from her prison. To Kairi's surprise, Naminé calls Riku by name, and disappears. Though Riku attempts to depart when Saïx escapes, he is stopped by Kairi and Pluto. Kairi, excited to see Riku, removes his hood, but is met with the face of Ansem, Seeker of Darkness. Though Riku felt ashamed to be seen in the form of their old enemy, Kairi took it in stride, as she could see the real Riku beneath the façade.

Kairi later is attacked by Heartless in her attempt to help Sora, and saved by Riku. He then gives Kairi the [[Destiny's Embrace]] Keyblade so that she may fight. After Sora defeats Xigbar, he and Kairi reunite. Riku tries to take his leave, but Kairi stops him. She then reveals Riku's identity, and with some concentration, Sora also sees Riku underneath his dark appearance. The revelation makes Sora overjoyed to the point of tears. Riku explains that he did not want to be found, thanks to his appearance, and confirms Sora's suspicions of the clues they found - namely, the ice cream and Roxas's photo. Afterwards, he and the others make their way up the castle, defeating the remaining Organization members save for Xemnas. During this time, Riku reveals the truth about Roxas to Sora, and realizes that he never had to fight him; Roxas had left Organization XIII because he had wanted to meet Sora in the first place, and would most likely have met him either way over time.

Near the top, Riku reunites with King Mickey and DiZ, who reveals himself to actually be Ansem the Wise. Ansem is using a machine to try and encode Kingdom Hearts into data, but Xemnas confronts him, and they trade bitter words. The machine then explodes, unable to handle Kingdom Hearts, sending Ansem the Wise to the Realm of Darkness while causing countless hearts Xemnas had collected into Kingdom Hearts to rain down on the world, creating a slew of Heartless. The explosion also cleanses Riku's heart and restores Riku to his original form, though he is still remorseful. After some encouragement, Riku traverses the rest of the castle alongside Sora, abandoning his cloak and blindfold. He and the others also encounter Maleficent and [[Pete]], who decide to hold off the hordes of Heartless that are overtaking the castle, but only so that they will eventually take the castle for their own.

[[File:To End Everything 01 KHII.png|thumb|right|Riku and Sora prepare to battle Xemnas.]]

After a series of battles, the two of them are drawn into nothingness by Xemnas and face off in a final, exhausting battle. Towards the end of the battle, Sora is left open and Riku takes a blow intended to finish off his friend, giving Sora the opportunity to beat Xemnas into submission, after which Riku and Sora fire a beam of light from Sora's Keyblade which finishes off the Superior. After his defeat, Sora and Riku face an onslaught of Dusks ready to fulfill their master's final order to eliminate the Keyblade wielders, but Sora and Riku successfully destroy them and escape the realm, entering the Dark Meridian.

Riku, severely exhausted and injured, asks Sora to sit with him on the shore. Having the time to finally talk, the two reconcile with each other. Riku then comes across a letter in a bottle, written by Kairi, and gives it to Sora, believing him to be the proper recipient. Sora then manages to open the Door to Light, which they walk through. Riku and Sora found themselves falling through the sky and into an ocean. Bewildered, they hear Kairi's voice calling out to them and are greeted by their friends from [[Disney Castle]]. While Sora shares a hug by Goofy and Donald, Riku happily reunites with Mickey.

[[File:Beneath the Hood 04 KHREC.png|thumb|right|Jiminy's Journal taking Riku's form.]]

After the Dataspace simulation finishes, King Mickey goes to talk to Yen Sid, who advises him to summon Sora and Riku for a [[Mark of Mastery exam]]. Mickey writes a letter to Sora, Riku, and Kairi, which he sends in a bottle to Destiny Islands.{{storylink|Blank Points}} As they sit on the beach, Sora and Riku watch the waves and comment that Destiny Islands is a small world, but also part of a much bigger one, then jump to discussion about the Door to the Light. Kairi then appears with Mickey's letter, which the trio reads together.{{storylink|Kingdom Hearts II}}

Riku accompanies Sora to the [[Mysterious Tower]] in response to a call from [[Yen Sid]] to undertake the Mark of Mastery exam in order to prepare for the coming return of [[Master Xehanort]]. Once told of the threat Master Xehanort poses, Riku does not hesitate to take the exam, seeing it as an opportunity to see whether or not he is worthy of wielding the Keyblade, especially after his past with the darkness. For their exam, Riku and Sora are sent to the [[Sleeping Worlds]], where they are to awaken several worlds that were restored following the defeat of Ansem but remained in a state of deep sleep.

[[File:Power Over Time 02 KH3D.png|thumb|right|Riku faces off against Young Xehanort at the Sanctum of Time.]]

However, once all the seven Keyholes in the Dreaming Realm are sealed, Sora ends up trapped in sleep in The World that Never Was, and Riku rushes to his rescue upon realizing this. He finds Sora in a comatose state inside the Castle, his heart having been damaged by Xemnas and the young man himself. The young man turns out to be an alternate timeline incarnation of Master Xehanort in his youth, who has been traveling to different periods in time to recruit several other incarnations of Xehanort together. Riku attempts to awaken Sora, but the darkness from Sora's nightmare turns into the [[Anti Black Coat]] that engages Riku. Riku manages to defeat the Anti Black Coat and carries on through the castle, eventually coming face to face with Ansem. Ansem reveals that Riku is actually a Dream Eater, and, over the course of the exam, has been purifying Sora's dreams of Nightmares. Ansem attempts to take over Riku's body again, but remembering his secret encounter with Terra, Riku resolves to make his inner darkness his own power for good and make Ansem become part of his light. Then the two battle each other once more. Ultimately, Riku prevails and eventually makes his way to Where Nothing Gathers, where he finds Sora on an Organization XIII throne. Young Xehanort blocks Riku's way, but Mickey comes to Riku's aid by casting a Stopza spell. Young Xehanort, however, is unaffected by the spell and knocks Mickey aside to battle Riku. After a fierce struggle, Riku defeats Young Xehanort. However, the victory is short-lived, as Master Xehanort is finally revived and joined by the rest of his new Organization, among them are Young Xehanort, Ansem, and Xemnas.

Master Xehanort fills Riku and Mickey in on his past attempt to create the [[χ-blade]] by pitting Ventus and [[Vanitas]] against each other. The plan failed, but he had a backup: Master Xehanort had Young Xehanort create a new Organization XIII made of Master Xehanort himself and twelve vessels to harbor a piece of his heart in order to create thirteen darknesses to battle seven lights and recreate the χ-blade. The thirteenth vessel was intended to be Riku but he became unfit as he built a resistance to darkness. The Organization then sought to use Roxas but he became too self-aware and returned to Sora, so now Sora has been chosen to be the last vessel. Riku and Mickey attempt to save Sora from Master Xehanort but are restrained by Ansem and Xemnas before [[Lea]] arrives and saves Sora. Ansem summons his Guardian, who grabs Riku and Mickey, but the Guardian is defeated by Donald and Goofy, who arrive via Mickey's old Star Shard. His plans temporarily derailed, Master Xehanort retreats with his Organization.

Riku brings Sora's comatose body back to the Mysterious Tower and dives into Sora's body to mend his fractured heart. In the process, he is forced to battle Sora, clad in Ventus's Keyblade Armor, which has been corrupted by a [[Armored Ventus Nightmare|Nightmare]]. Riku defeats the Nightmare and uses Sora's Keyblade to enter a memory of the Destiny Islands, deep inside Sora's heart. Here he meets projections of Roxas, Ventus, and Xion, who each ask a question before disappearing. After answering the three questions, Riku finds a bottle in the surf, and a data projection of Ansem the Wise approaches him. Ansem tells Riku about [[Ansem's Code]], research data contained in the bottle that he had hid inside Sora while he was asleep. He muses about Sora's ability to connect with others' hearts, and how it may be able to bring back those that have been lost. He tells Riku that by defeating the Nightmare and answering the three questions, he has successfully awakened Sora. Riku returns to the real world, reuniting with Sora and the others, and Yen Sid names Riku as a Keyblade Master. Riku and the other are shocked when Lea vows to catch up with him, reveals his plan of becoming a Keyblade Master, and successfully — albeit accidentally —  summons his Keyblade.

[[File:2.9 - The First Volume 04 KH0.2.png|thumb|right|Riku and Mickey head off with their new duds.]]  

[[File:Reunion 01 KHIII.png|thumb|200px|left|Riku leaves his shattered Keyblade for the Replica.]]

In order to gather the seven guardians of light, Riku and King Mickey enter the Dark World in search of Aqua. They follow her trail to the Dark Margin, but when they arrive, they find no trace of her, her trail having gone cold deeper into darkness. A group of Shadows appear and form a [[Demon Tower]], which quickly overwhelms them. Riku finds himself consumed by the darkness, nearly drowning in it, until he is saved by his replica's disembodied heart. He blacks out and wakes on the beach, finding his Keyblade destroyed from the battle. Though Riku insists on staying to save Aqua from the same fear and loneliness he once felt in the Dark World, Mickey convinces him to retreat back to Yen Sid to regroup and resupply. Before leaving, Riku plants his broken Keyblade on the beach for the Riku Replica to collect.

At the Mysterious Tower, Yen Sid suggests that as Aqua visited many worlds during her own journey, it may be prudent for Riku and Mickey to follow her footsteps to gain clues to her current whereabouts. He provides new garments for Kairi and Lea, and requests that Riku and Mickey deliver them when they visit Merlin to gain new Keyblades. Now armed with the [[Braveheart]], Riku travels with Mickey to Radiant Garden, the last place Aqua was seen in the Realm of Light. They discuss the path of Xehanort's heart through time and vessels, and the realization that the Xehanort that served Ansem the Wise was in fact a possessed Terra. After a phone call from Sora, they head into the castle to discuss the replica project with [[Ienzo]].

Without any new leads to her location, Riku and Mickey travel back to the Dark Margin to pick up Aqua's trail. Again they are assaulted by the Demon Tower, and again are overwhelmed by it. This time, however, Mickey is disarmed and trapped within it, and [[Anti-Aqua]] reveals herself from its depths. She claims Mickey's Keyblade, planning to use it to return to the Realm of Light, leaving Riku and Mickey trapped behind as she was. Riku connects with his replica's heart and uses their combined strength to confront Aqua and the Demon Tower. The fight takes its toll on Riku and, faltering, he speaks Sora's name. This connection allows Sora to enter the realm of darkness, where he defends Riku and defeats Aqua, freeing her from the Darkness. Riku is by her side as she awakens in the Realm of Light.

With all seven guardians finally assembled, they meet at the Mysterious Tower, where Riku thanks Aqua for saving him during his first visit to the Realm of Darkness. Yen Sid tells them all to spend the day recuperating before meeting at the Keyblade Graveyard. Riku accompanies Sora and Kairi to the Destiny Islands, but spends the evening on the beach alone so he may speak to the replica in his heart. The replica admits he would rather exist within Riku's heart than fade into darkness, and states he has "one last thing to do".

The next day, Riku joins the other guardians in the Keyblade Graveyard, where he helps battle the horde of Heartless, Nobodies, and Unversed summoned by the real Organization XIII and passes through the fissure ahead of Sora. On the other side, Terra-Xehanort appears and attacks the guardians, incapacitating Ventus and Lea before being ejected from the battlefield. In his wake, a massive Demon Tide appears, and though Riku tries to rally Sora and Aqua to fight it, it quickly devours them all except for himself and Sora. As Sora breaks down in tears, Riku steps forward with a simple statement of faith in him, and faces down the Demon Tide alone.

Unable to stem the tide, Riku and Sora are both swallowed by darkness. However, Sora is able to recover himself in [[the Final World]] and track down his friends hearts using the power of waking. Riku's heart makes its way to Olympus, where it is captured by a [[Lich]]. Sora manages to catch the Lich and free Riku's heart, sending it back to the Keyblade Graveyard. When Sora frees all of his friends' hearts, they reappear together, moments before Terra-Xehanort first appeared.

[[File:Riku and Riku 01 KHIII.png|thumb|200px|left|Riku fights Dark Riku alone.]]

This time, they are rescued from Terra-Xehanort's attack by the [[Lingering Will]], allowing Riku and the others to fight off the incoming Heartless while Sora, Donald, and Goofy defeat the Demon Tide. Finally, they advance to face the organization within the Skein of Severance. Riku battles Dark Riku, Xigbar, and Ansem alone until Sora arrives. Ansem flees the battle, but Sora and Riku manage to defeat the others. The Riku Replica's heart exits Riku's body, and reveals that Dark Riku is, in fact, his own heart from the past. He pulls Dark Riku's heart from the replica body and leaves the vessel behind for Naminé.

Riku then proceeds through the maze alone. He meets Sora and Mickey again after nine seekers of darkness have been defeated. Ansem, Xemnas, Master Xehanort, and his younger self remain, and Master Xehanort reveals that their four clashes would forge the final keys he needed to form the χ-blade. Riku claims that even if Master Xehanort manages to open Kingdom Hearts, they would simply defeat him and close it again. The two groups clash, and all but Master Xehanort are eliminated. As Ansem fades away, he speaks to Riku, reminiscing on the journey they shared.

With one key left to forge, Xehanort reveals the kidnapped Kairi and slays her in front of them. Sora and Riku both attempt to attack Xehanort, but are easily repelled. Riku and Mickey are then frozen by a Stopza spell, and Xehanort summons Kingdom Hearts. The other guardians arrive as the spell wears off, and Riku presents the idea of using Xehanort as a portal and trapping him in it long enough to finish him. Though Riku, Mickey, and Aqua plan to go into the final battle, Sora, Donald, and Goofy volunteer to go instead, so that the other Keyblade wielders could remain to hold back the power of Kingdom Hearts.

[[File:Ending 04 KHIII.png|thumb|right|200px|Naminé reunites with Riku in her new individual body.]]

Some time later, Riku takes Sora's gummi ship to Radiant Garden to collect Naminé, and returns with her to Destiny Islands along with all the guardians and their friends. He runs a race with Terra and Roxas before looking toward the paopu tree where Kairi sits with the fading image of Sora.

{{-}}

===''Yozora''===

Riku awakens in an unknown world. Disoriented, he walks the streets observing where he is, eventually finding himself at the {{w|Tokyo Metropolitan Government Building}}, unaware that [[Yozora]] watches him from atop.{{storylink|Yozora (video)|Yozora}}

Riku is five years old during ''Kingdom Hearts Birth by Sleep'', fifteen during the events of ''Kingdom Hearts'' and ''Kingdom Hearts Chain of Memories'', sixteen during the events of ''Kingdom Hearts 358/2 Days'' and ''Kingdom Hearts II'', and seventeen during the events of ''Kingdom Hearts 3D: Dream Drop Distance''<!--According to the journal entries of Ventus and Aqua in KH3D, over twelve years have passed since BBS; thus, Riku is seventeen in KH3D. Also, in the Blank Points cutscene in BBS, Ansem the Wise says "It's been a year now, perhaps more."-->.  

Riku is a teenage boy with silver hair with bangs, pale skin, bright blue-green eyes (green in ''Kingdom Hearts III''), and a muscular build. Since he is a year older than Sora and Kairi, Riku is the tallest of the trio. Riku's hair was originally shoulder-length, but in ''Kingdom Hearts 358/2 Days'' and ''Kingdom Hearts II'', his hair has grown longer until it reaches his upper back. Some time before ''Kingdom Hearts 3D: Dream Drop Distance'', he cut it short to the length it was when he was a child. Much like Sora, while his general appearance does not change much throughout the series, Riku receives several costumes and form changes during the course of his adventures.

Riku (partly thanks to Maleficent) became thoroughly jealous of Sora after learning about his possession of the Keyblade and of his new friends. He even openly accused Sora of forgetting about him and Kairi since he was not also actively looking for a way to retrieve Kairi's heart. That envy eventually corrupted his perspective of their friendship into a rivalry, much to Sora's confusion, and resulted in his battles with Sora and his eventual possession by Ansem, Seeker of Darkness.

While his traits weren't very heroic for most of the first game, Riku becomes much more noble by the end. Since Riku had done everything he had out of care for Kairi, when Ansem was about to use him to use her along with the other six Princesses of Heart to open the Final Keyhole, he finally broke free and held off Ansem long enough for Donald, Goofy and Kairi to escape. When Riku finds himself in the endless abyss near the Door to Darkness, he is on his knees, overwhelmed with guilt for what he has done.

In ''Kingdom Hearts Chain of Memories'', Riku makes many self-realizations, one of which is that he had let his heart become weak, and some time after that, he would shy away from the darkness within it. Through his battles in Castle Oblivion, he makes another big realization: he can't get rid of the darkness in his heart, and decides to use it without turning away from the light like before, declaring his path down the "road to dawn," also signifying his effort for redemption. Additionally, he forms a strong bond with Mickey during their time together in Castle Oblivion, and later begins to address him familiarly throughout the rest of the series.  

In ''Kingdom Hearts II'', he shows a great amount of loyalty and protectiveness for his friends. He never wanted Sora and Kairi to find out about his time spent in the darkness, and did everything he could to bring Roxas to DiZ to make Sora whole again, even going as far as giving up his physical form and assuming Ansem's. As Sora journeyed through the worlds, Riku left him valuable clues, such as the sea-salt ice cream and the picture of the Twilight Town gang, and almost died to protect him from Xemnas' attacks, which left him greatly injured after the battle. When he is finally found in the World That Never Was, he repeatedly shows signs immense regret for his previous behavior. He could not understand how Sora is so willing to forgive him, telling him that he didn't actually want to be found, and almost refusing to come back to Destiny Islands because of his shame for his wrongdoings. Though Riku humbles significantly over the course of the series, he still retains a lighthearted and jokingly arrogant side, referring to Sora, Donald and Goofy as "wise guys" to [[the Emperor]], cracking a joke about Donald and Goofy's intelligence, and calling Sora a "total sap" before joining forces to confront Xemnas.

When he was young, Riku had been curious with everything that is outside of his world. Over time, his curiosity became obsession, and he eventually opened his heart up to darkness in order to escape his "prison surrounded by water," as phrased by Ansem. This obsession completely vanishes throughout the year of Sora's slumber, most likely because of all the trouble it brought into his formerly simple life and how foolish he ended up acting once his curiosity was sated. When he returns to Destiny Islands in ''Kingdom Hearts II'', he still comments on how small a world it is, but agrees with Sora's remark that it is part of one much bigger. This shows that Riku has a much better view of his homeworld than before, making him all the more content.

Riku's Soul Eater changes into Way to the Dawn sometime between the second visit to Land of Dragons and [[The World That Never Was]]. When he turned into his "true form" in the end of ''[[Kingdom Hearts II]]'', his powers of light increased dramatically while his powers of darkness decreased. As a party member, Riku possesses various abilities that combine his dark powers with Sora's light powers. Riku can use a new Dark Aura that fires Dark Firaga orbs that inflict a [[Stop]] effect whenever Sora completes a combo, Dark Shield to project a barrier of darkness, as well as to numerous other powers. In his Limit with Sora, Eternal Session, Riku is able to project waves of dark energy from his Keyblade in addition to unleashing fast combos and Dark Firaga barrages.

At the end, Sora and Riku toss their Keyblades together to act as a super-damaging magnet. It should be noted, though, that despite the fact that Riku is a wielder of the Keyblade, he can't use any of Sora's [[keychains]] while he is in the party. Also, Riku is one of the three only characters shown being able to summon [[Synch Blade|more than one Keyblade]] at once, the other two being Roxas and [[Sora]].

In ''[[Kingdom Hearts III]]'', Way to the Dawn is snapped in half by a [[Demon Tower]] in the [[Realm of Darkness]]. Riku leaves it behind for the [[Riku Replica|other him]], and goes to ask [[Yen Sid]] to help him get a new Keyblade to replace it. This Keyblade, [[Braveheart]], resembles a modern car key.

 

After accumulating enough [[DP]] on the [[DP Gauge|Dark Gauge]], Riku enters [[Dark Mode]], where he is faster, stronger and capable of using an array of special abilities. His regular combo is heavily upgraded as the finishing attack has the opportunity to stun enemies. A quick, clean dash takes the place of his tumble. Additionally, the [[Holy Burst]] sleight is replaced with a more powerful [[Inverse Burst]] that has a longer duration. Most importantly, Riku has the ability to use three new sleights in Dark Mode by stocking together three attack cards. The sleight chosen depends on the sum of the card values. The lowest value sleight, [[Dark Break]], causes Riku to leap into the air and attack enemies from above. [[Dark Firaga]] shoots a bolt of dark energy at an enemy. Lastly, [[Dark Aura]], a sleight requiring the max value of 27, allows Riku to rush enemies repeatedly from all directions and then release a mass of dark energy at the end.

 

In ''Kingdom Hearts Re:Chain of Memories'', Riku has the ability to use Dual sleights, which are triggered after winning a card duel. Depending on the enemy, Riku will use one of three sleights: [[Impulse]], [[Maelstrom]], or [[Barrage]]. The former deals damage to multiple enemies while the other two are concentrated on one enemy. When Riku is in Dark Mode, he uses more powerful, upgraded versions of the default Dual sleights: [[Dark Impulse]], [[Dark Maelstrom]], and [[Dark Barrage]].

===''Kingdom Hearts 358/2 Days''===

[[File:Gameplay (Riku) KHD.png|thumb|Riku in Mission Mode.]]

Riku is unlocked as a playable character in [[Mission Mode]], after being promoted to "Agent" rank on Day 172. He wields his [[Soul Eater]] and [[Way to the Dawn]] Keyblades, which are labelled in-game as a "Sword" weapon category. Riku's combo attacks contain quick and powerful strikes and his combo finishers usually hit more than one enemy, making him decent in crowd control. Riku's stats rate him above average, with decent strength and HP. Riku excels in the Critical area, with high Critical chance and bonus. However, his magic leaves something to be desired. Riku's Limit Break, [[Darkstrom]], causes him to dart around the field and attack enemies. In the Final Limit, Riku's weapon is enveloped in light, which he uses to swing at enemies, similar to Roxas's and Xion's [[Event Horizon]] Limit Break, although Riku's swings are noticeably slower.

As a party member, Riku is very similar to Beast from ''{{c|Kingdom Hearts|game}}'', in the sense that he is the game's final party member, as well as the strongest. He has high strength, magic, and above-average defense.  He has two armor slots, one accessory slot, and six item slots. He has great flexibility in that he can deal high amounts of damage and he has the capacity to heal and block attacks.

Riku's main action abilities are executed as reaction commands that become available after certain situations. After Sora finishes a combo, Riku can use [[Dark Aura]] to fire multiple dark orbs that stun enemies. When Sora takes damage, Riku can cast [[Dark Shield]] to protect him. Riku can also use one non-reaction command ability, [[Cure Potion]], which restores the party to maximum health.

His limit, [[Eternal Session]], unleashes a joint attack between Sora and Riku that expels high amounts of damage.

He has access to some of the most useful support abilities, such as [[MP Hastega]], [[Second Chance]], and [[Once More]], in addition to ones with more miscellaneous effects, such as [[Item Boost]], [[Defender]], [[Auto Limit]], and [[Hyper Healing]].

By the time his Mark of Mastery exam was near its end, Xehanort's younger-self had revealed that Riku's long-time exposure to darkness made him immune to its corrupting qualities, which prevented him from becoming one of Master Xehanort's new vessels, along with the power he gained from accepting himself.<ref>'''''[[Kingdom Hearts 3D: Dream Drop Distance]]''''', '''Young Xehanort''': "Yes. We originally had our sights set on you. But, you developed a certain... resistance to darkness."</ref>

Riku is briefly playable after completing [[Olympus]] and once more after completing [[The Caribbean]] and [[San Fransokyo]]. Both times, he faces against the Demon Tide. Riku has access to Thundaga and Curaga for magic and has 1 Hi-Potion and 1 Ether. Riku also has no shotlocks nor does he have a command styles. He uses Dark Roll and Dark Barrier. Riku's unique finisher is [[Dark Firaga]], which performs identically to its ''[[Kingdom Hearts 3D: Dream Drop Distance]]'' appearance. Riku attacks swiftly and many of his attacks are wide and are performed with a 360° move. During the first fight, he wields his [[Way to the Dawn]] Keyblade. His guard is a joint barrier with Mickey, which can be followed with a joint Counter Blast. During this fight, Riku's finisher is called [[Double Cross]]. When performing this move, Riku and Mickey both perform a buzzsaw move twice, which deals incredible damage.

Riku becomes a party member at the Keyblade Graveyard in a fight against Xigbar and Dark Riku, and against Ansem, Xemnas, and Young Xehanort. As a party member, Riku performs the same techniques as he did against the Demon Tide and Anti-Aqua. Riku will often perform Dark Firaga, which helps deals a lot of damage against the three Xehanorts.

==Trivia==

*Roxas's battle with Riku, as seen in ''Another Side, Another Story'', involves him running up the side of Memory Skyscraper and passing by Riku as he leaps off. A similar scene occurs when Sora and Xemnas later battle in the same area.

*Riku is the first non-party assistance character to appear in the ''Kingdom Hearts'' universe as he helps Sora, Donald, and Goofy fight the Parasite Cage in Monstro the first battle.  

*It is stated in the ''[[Director's Secret Report XIII]]'' that one of the four untold stories is "the period of Riku's absence", though that has not been further delved into. The other three were about "the period of the King's absence" (''Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-''), Roxas's time with the Organization (''Kingdom Hearts 358/2 Days''), and Xehanort's past (''Kingdom Hearts Birth by Sleep'').<!--NOMURA SAID THAT HE WAS REFERRING TO MICKEY IN THE REALM OF DARKNESS-->

*An interesting note is that Riku wields Soul Eater, the Kingdom Key, and the Keyblade of heart on the opposite side of the handle, with the blade facing down when he is in his battle stance, except as a playable character in ''Kingdom Hearts 358/2 Days''. Even in ''Kingdom Hearts II'' and when he is playable in ''Kingdom Hearts 358/2 Days'', he holds Way to the Dawn on the opposite side, though the blade faces a bit to the side.