Editing Lady Tremaine

{{cleanup|Story section for her role in ''KHX''}}

'''Lady Tremaine''' is an antagonist in ''[[Kingdom Hearts Birth by Sleep]]'' and ''[[Kingdom Hearts Union χ]]''. She originally appeared in the animated film ''{{w|Cinderella (1950 film)|Cinderella}}''. She is [[Cinderella]]'s cruel and abusive stepmother, the biological mother of her preferred children [[Anastasia and Drizella]], and she eventually becomes the source of the [[Cursed Coach]] Unversed and [[Mean Maiden]] Heartless.

Lady Tremaine and her daughters treat Cinderella contemptuously, forcing her step-daughter to serve them as a servant. The wicked stepmother does all in her power to see that her biological daughters are successful in life, even going as far as to ruin the lives of others. She is upset by their constant sibling rivalry, and displays extreme affection for her devious cat [[Lucifer]].

After discovering the identity of the maiden that had won [[Prince Charming]]'s heart at the royal ball to be none other than Cinderella, Lady Tremaine locked her in her room when the [[Grand Duke]] arrived with the glass slipper. The slipper does not fit them, and out of nowhere, [[Aqua]] appears and offers to try it on, giving [[Jaq]] time to free Cinderella. Lady Tremaine asks who Aqua is and what she is doing in her house, and attempts to force the [[Grand Duke]] to leave. Cinderella appears, having been let out of her room by Jaq. Lady Tremaine tries to convince the Duke to leave again, but he insists on Cinderella trying on the slipper as per his orders. Lady Tremaine trips him so the slipper shatters, but Cinderella has the other slipper in her pocket. Enraged when the slipper fit Cinderella, Lady Tremaine used the extreme jealousy and hatred in her heart to turn Cinderella's pumpkin carriage into an [[Unversed]], the [[Cursed Coach]], in an attempt to eliminate Cinderella and Aqua. Her scheme backfired when one of the fire bombs the Cursed Coach produced landed on her and her daughters, killing all three of the maidens instantly.  

[[File:A Perfect Fit 02 KHBBS.png|thumb|Lady Tremaine refusing to let Cinderella have her happily ever after.]]

Lady Tremaine is depicted as a cunning, cruel, snobbish, and, as her nickname describes, wicked person. While showing affection toward her daughters and her cat Lucifer, she shows only hatefulness towards Cinderella, treating her as no less than an indentured servant. Her cruelty and jealousy ultimately becomes her downfall, as she is blown away along with her daughters by one of the Cursed Coach's bombs.

Inspired by the wicked stepmother from Charles Perrault's fairy tale ''{{w|Cinderella|Cendrillon}}'', Lady Tremaine debuted as the main antagonist of Disney's classic film ''Cinderella''. Doing all in her power to make Cinderella's life miserable for the good of Anastasia and Drizella's own welfare, the wicked stepmother was often seen pampering her spoiled cat, Lucifer. She prevents Cinderella from attending the ball by assigning her several chores and, when Cinderella procures a dress her animal friends made, has her stepdaughters destroy it. However, at the ball, Lady Tremaine notices a mysterious woman attract Prince Charming's attention. Back at home, Lady Tremaine realizes that the mysterious woman was, in fact, Cinderella, and locks her up in her room. She uses her conniving and trickery when the Grand Duke came to her estate with a single glass slipper that would announce Prince Charming's wife, having her birth daughters try the delicate footwear and then claiming there was no one else to try it on in the house when it does not fit on either of the girls. However, thanks to Cinderella's many animal friends, her plans fail, and the maiden that was once a servant goes off to the castle to become a princess.