Dark Figure

The One Behind
	File:The One Behind KHBBS.png
Japanese	うしろの人
Rōmaji	Ushiro no Jin
Type	Construct
Games	Kingdom Hearts; Kingdom Hearts Chain of Memories; Kingdom Hearts 358/2 Days; Kingdom Hearts Birth by Sleep; Kingdom Hearts 3D: Dream Drop Distance; Kingdom Hearts III
Variations
• Terra;
KH tracks
	Battle theme - The Deep End
	Battle theme - Forze del Male
	File:Forze del Male KHHD.ogg
KHCOM tracks
	Battle theme - Revenge of Chaos
KHBBS tracks
	Battle theme - Dismiss
KH3D tracks
	Battle theme - L'Emineza Oscura I
	Battle theme - L'Eminenza Oscura II

Oh no! The water! I'm in big trouble if I don't fetch it!

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The One Behind, also referred to as "Ansem's shadow", "The monster behind Ansem"[?], "Terra's phantom"[?], "Xehanort's shadowy other", and the "small, Darkside-like being" or "shadow"[?], is a container for Terra's heart which is used by various vessels for Xehanort throughout the Kingdom Hearts series. While it contains Terra's heart and resembles a Heartless, it is not actually one of them, and Terra's heart frequently shifts between the One Behind and Terra-Xehanort's physical body.

It is first created by Terra-Xehanort to battle Aqua in Radiant Garden, and is inherited by his Heartless, Ansem, Seeker of Darkness. It is also channeled by Riku when he draws upon the darkness of Ansem still lingering in his heart during his battle with Roxas. The One Behind serves not only to protect its user from attacks, but also to fight for him when needed.

Story

Kingdom Hearts Birth by Sleep

File:Return my friend's heart 01 KHBBS.png

Terra-Xehanort summons the One Behind to aid him against Aqua.

Having lost his first battle against Aqua, Terra-Xehanort's great rage[?] causes the One Behind to spawn behind him. The dark entity then teams up with Terra-Xehanort to challenge Aqua one final time. Upon Terra-Xehanort's second defeat at Aqua's hand, Master Xehanort attempts to force what remains of Terra out of him by unlocking his heart. However, the One Behind reappears and begins to fade, opening a portal to the Realm of Darkness which swallows it and Terra-Xehanort. Aqua then dives in after them and sacrifices both her armor and Keyblade to save Terra's body.

Kingdom Hearts

After conversing with Sora over the true nature of the heart, Ansem, Seeker of Darkness summons his original persona's One Behind and attacks. The One Behind reappears alongside Ansem during his second battle with Sora as part of the World of Chaos.[citation needed]

Kingdom Hearts Chain of Memories

After Riku emerges from the twelfth basement of Castle Oblivion, Ansem, Seeker of Darkness appears before him and attempts to retake his body. However, Riku chooses to fight rather than submit, enraging Ansem, who summons the One Behind and attacks.

Later, Riku reaches the first basement of Castle Oblivion and uses Naminé's Castle Oblivion World Card to bring forth Ansem. Ansem creates around them a facsimile of Kingdom Hearts itself, and again summons the One Behind. However, Riku is able to defeat the pair and emerges from the battles having conquered his inner darkness.

Kingdom Hearts 358/2 Days

Realizing his loss to Roxas is inevitable, Riku unleashes Ansem's darkness that he had been holding back from within his heart. Riku, now in Ansem's form, uses the One Behind to grab Roxas and knock him out, so that he can bring Roxas to DiZ.

Kingdom Hearts 3D: Dream Drop Distance

As it disintegrates, the One Behind reaches for Riku, echoing Terra.

In the sleeping version of The World that Never Was, Ansem appears to Riku, attempting to persuade him once again to open himself to darkness and allow his possession. However, Riku chooses to fight and vanquish his inner darkness, causing Ansem to surround them in darkness and summon the One Behind. After a first battle, Ansem enlarges the One Behind and merges with it, but Riku defeats this form as well.

Later, in the real world, Ansem summons the One Behind to prevent Riku, King Mickey, and Lea from rescuing Sora from Master Xehanort. The One Behind grabs Mickey and Riku to prevent them from leaving, but is defeated when Donald and Goofy crash into its head after warping in with the Star Shard.

Kingdom Hearts III

"One day...I...will...set...this...right... One day...I will set...this right... I will return to this land...and protect...my friends!"

—The One Behind makes its declaration.

The One Behind saves Aqua and Ventus from Terra-Xehanort.

The One Behind first appears in the Realm of Darkness, to fight off an unarmed Aqua, who is attempting to keep Ansem the Wise out of the Organization's clutches. After tossing Aqua across the End of Sea, the One Behind conjures a dark orb and launches it at Aqua's heart, transforming her into Anti-Aqua.

The One Behind next appears to defend Ansem when Hayner attempts to ambush him at Twilight Town. Ansem pursues but is waylaid by Vexen's Dusks, with the One Behind defending him again.

At the Keyblade Graveyard, Aqua, Ventus, and Sora fight Terra-Xehanort in one final battle. When Terra-Xehanort captures the trio and prepares to do away with Aqua and Ventus, the One Behind moves on its own to intervene and save them. It then breaks the chains binding the trio and lays the unconscious Aqua and Ventus safely on the ground. Terra-Xehanort is surprised by Terra's heart taking control of the vessel and insists that it had been consumed by the darkness, but the One Behind removes its gages and declares the promise to set things right it had made as Terra. While the One Behind is keeping Terra-Xehanort restrained, Sora quickly uses his Keyblade to expel Xehanort's heart from Terra's body, allowing Terra's heart to reclaim his rightful body and finally terminating the existence of the One Behind.

Design

The One Behind has an ink-black, muscular, humanoid form with a partially bandaged head that hosts relatively human features, bearing some resemblance to Master Xehanort. The bandages are gags representing the shackles Xehanort has placed on Terra's heart. It has yellow eyes gleaming above a mouth filled with sharp teeth, as well as two long antennae spouting from the top of its head. A hole appears in between more bandages on the torso in the shape of a heart, much similar to the heart-shaped hole that appears in many of the Pureblood Heartless. Lastly, it has very large hands, its torso coming to a tail-like point that fades away into its host's body.

When it merges with Ansem at The World That Never Was, the One Behind becomes much larger, and its lower body forms into an orb of darkness which surrounds Ansem, with two indigo wings extending from the sides and curving downward.

While part of the World of Chaos[citation needed], the One Behind mutates, its antennae becoming long horns, the rest of its body distorted by the darkness to look more muscular and ominous. Blue orbs rest on its shoulders, faint golden eyes also on the chest. Red tendrils extend from the back, attaching to the One Behind with a snake's head-like attachment. Its hands become more claw-like with large, organic sleeves covering its arms, and an extension similar to a scorpion's stinger juts out of its back. The torso also appears more skeletal, with multiple ribs and vertebrae showing.

Abilities

The One Behind has many dark powers with which it assists its host. It possesses great physical strength, impervious to all damage. While it tends to stay behind its host, it can be commanded to detach itself from that host to attack its victims. Able to latch onto these opponents and drain their HP, the One Behind can also hit them with bursts of energy spawned from its fists, mighty punches, and even spheres of energy. Similar to a Pureblood Heartless, the One Behind's most devastating ability allows it to sink into the ground, creating massive shockwaves every time it re-emerges. The One Behind also has the power to shoot disc-like projectiles at enemies, greatly multiplying the host's powers with its own as they double-team opponents to ram them with brute force while shining with a dark aura.

In its World of Chaos form,[citation needed] the One Behind becomes more of a defense mechanism than one of offense, able to summon Bit Snipers to distract opponents and to whip its massive sleeves to create large whirlwinds with the purpose of blowing enemies away. It can also drain an opponent's MP. While it is only when the One Behind is paired with its host that it is a formidable opponent, it is shown to hold its own quite well without influence, mercilessly attacking the opponent without ceasing.

Kingdom Hearts

Ansem (first battle)

Main article: Game:Ansem, Seeker of Darkness

When paired with Ansem, Seeker of Darkness, the One Behind will immediately go on the offensive in battle, punching opponents if they come too close or bombarding them with dark projectiles if they are out of attack range. On Ansem's command, the One Behind will appear in front of him, preventing him from being damaged. However, Aeroga, or attacks such as Ragnarok, can still hit Ansem if Sora runs around to his location. The One Behind may also obey Ansem's command to leave him and attach itself to Sora, a "?" occasionally appearing over Sora's head once this occurs. If is pressed when this icon is on the screen, the One Behind will latch onto Sora and drain a large amount of his HP. It will eventually return to Ansem in the end, however. Use careful timing of the Dodge Roll ability to dodge this attack, as well as use Curaga when necessary. Guard can be used to earn Tech Points when Sora deflects the dark discs the One Behind shoots back at it.