Karolina being bisexual without having been prior groomed by an adult pervert makes as little sense as Spider-Man giving birth to himself. And of course, the girl that can turn into a rainbow is made the lesbo. And a very unrealistic one at that. More realistically, she'd be cutting herself more than Nico and going from one relationship to the next every three weeks, due to massive instability and an inability to stick to one story. She'd also probably have ODD, and a tendency to be a feminazi.

So far, Karolina has displayed few if any of those typical tendencies. Another reason I have to call BS on the writers. I once dated a gal who turned out to be bi. And observed a lot of the behaviors in her that I've just described. Never again.

(Notice a trend, by the way?)