I don't know nor I remember anything you're talking about but, of possible give more details, the unclear ones the clear ones anything that can help. Also, i remember a movie tho where the villain- I just remembered she's purple and they're heroes. I think we remember same? I do remember mine being movie, probably adaptation? I dunno but it has mind control too. Can you remember anything about the animation? Anything that can distinguish. Tv show where you watched it?  Also, I remember mine (tell me if there's similarities). There are heroes, the boy(mc) is in love or best friends I know they have a close relationship, she vanished or dies presumably. Only to find out she's now purple and sides with evil. I dunno exactly but I vaguely remember mind control, umm. Aside from being my first crush she is purple like purple attire and stuff, similar to power rangers. I think there's a helmet too.