First Karai's revealed as Miwa...
Then Karai whines about her mom getting killed by Splinter, or in Nick's kid-friendly way "Getting taken away"...
And then Karai figures out the truth and reunites with Splinter, her real father, only for ass-wad Shredder to mutate her, then blame Spinter for it...
And NOW, she's brainwashed and back on the Footclan!
Kind of reminds me about an annoying never-ending Japanese cartoon where to took 50 or more seasons for the emo-kid to end up as the best friend again. The show was Naruto-Naruto Shipponen.
So it's very likely that Karai will be a willing idiot until the final episode of the show.
So the real question is this...is Karai going to be the 'Sasuke'?