Karai (TMNT 2012)

Karai is one of the main villains of the 2012 Teenage Mutant Ninja Turtles show on Nickelodeon. Like other versions of the character she is the Shredder's disciple and a high-ranking member of the Foot Clan. She is voiced by Kelly Hu

History
Karai first appears in the episode "New Girl in Town" in which she crosses paths with Leonardo. Though she effortlessly overpowers him in their first fight she lets him live, much to her master Shredder's fury. She later runs into Leonardo again and duels him, seeming to be at least his equal but possibly a little better. During the duel Karai attempts to seduce Leonardo, who resists and in turn attempts to get Karai to admit to having a streak of heroism inside her, to which she brushes off. She later attempts to convince Leonardo to help her steal a sword on display, to which he refuses. Leo again attempts to reason with Karai, but again she rebuffs him. However, she does save Leonardo and Raphael from Snakeweed when the Mutant attacks them, giving Leonardo hope that there is good in her.

However, in Karai's next appearance "Alien Agenda", she betrays the Turtles during a battle with Kraang forces, leaving them to fend for themselves against both the Kraang and also a mutant monster that Karai accidentally created. While the turtles fight, Karai gives Shredder a piece of Kraang technology, managing in the process to convince him of it's worth.

Karai's next appearance is "Enemy of my Enemy", where upon learning of the threat the Kraang pose seeks an alliance with the Turtles, who are reluctant to trust her again. Though Leonardo manages to convince his brothers to trust Karai, he later goes along with their plan to try and take down the Shredder when he shows up to claim some weapons with which Karai planned to take down the Kraang with. Upon realizing that the Turtles took advantage of their partnership, a hurt Karai angrily condemns Leonardo and from then on goes from a friendly opponent to a hateful arch-enemy. Her subsequent appearances reflect this change in personality, her previous sociable and friendly personality having been replaced with sadism. Her last Season 1 appearance was in the second part of the finale, where Splinter learned while fighting Shredder that Karai was in fact his and Tang Shen's daughter Miwa, who Shredder had taken as his own the night he killed Tang Shen, raising her to hate her biological father under the lie that he was Tang Shen's killer and not him. She has yet to learn the truth.