Ca will have two forms, her "natural":
Which we all know, love, and are probably sexually attracted to--
Ahem...anyways, yeah. And yes, her hair color will be changing...kind of at random? But I'll usually have it at like orange or maybe her official pink. And of course blue, for cosplay...you get the idea.
Then there's her "human" form:
(^^the second one is probably more accurate to what I imagine)
She can change into either one, but her natural is easier for her.
Does she have powers? Perhaps...
Can't reveal all the surprises at once ;)