Lady Tremaine is Cinderella's wicked stepmother and the main antagonist in her film of origin, Disney's 1950 full-length animated feature, Cinderella. She is mother by blood of Anastasia and Drizella, and while she forces Cinderella to work as a maid, she will do anything to ensure her two daughters' success. Lady Tremaine makes her Kingdom Hearts series debut in Kingdom Hearts Birth by Sleep, but even though she is the main antagonist in the Castle of Dreams, she is not fought as a boss.
 Kingdom Hearts Birth by Sleep
In Kingdom Hearts Birth by Sleep, Lady Tremaine's role is identical to that of her film role. Treating Cinderella as a house servant and showing no love towards her, the wicked stepmother does all in her power to see that her daughters are successful in life. She is upset by their constant sibling rivalry, also showing an extreme affection for her devious cat named Lucifer, despite the animal's cruelty to Cinderella's mouse friends.
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 immediately locked her in her room when it came time for Anastasia and Drizella to try on a single glass slipper that had been left behind when the girl fled. Enraged when Cinderella was let out of her room by Jaq and the slipper fit her, Lady Tremaine used the extreme jealousy 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, leaving their fate unknown.
Lady Tremaine is depicted as a cunning, cruel, and, as her nickname describes, wicked person. While showing a lot of affection toward her daughters and her cat Lucifer, she shows no love for Cinderella (possibly showing hatefulness towards her), treating her as no less than an indentured servant. All-in-all, her cruelty and jealousy ultimately becomes her downfall, as she is presumably blown away along with her daughters by one of the Cursed Coach's bombs.
Lady Tremaine is an older woman with pointed, triangular facial features, including a relatively large, hooked nose with pronounced creases on either side of it. Her eyes are light green, her eyebrows are black and set high on her face, and her hair is gray with a light gray streak in the front. Her hair is worn in a short, heart-shaped style. She also wears eye shadow and dull red lipstick, as well as a blue-green, orb-shaped earring on each ear and a matching ring on her right ring finger.
Lady Tremaine is only seen wearing her formal attire in Kingdom Hearts Birth by Sleep. This consists of a pleated, purple dress with short sleeves, a high, violet-pink collar, and frills of the same color at the end of both sleeves.
Originating from Disney's classic film Cinderella, Lady Tremaine served as a quiet but cunning antagonist. 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 used 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 didn't fit on either of the girls. However, thanks to Cinderella's many animal friends, her plans failed, and the maiden that was once a servant goes off to the castle to become a princess.