You have to pick:

Are we talking metaphorically, in the sense that Hitler was a monster, or literally, in the sense that a manticore is a monster?

Given the context of the intended pairing, I'd say metaphorically. If the context of a different pairing causes the opposite to make more sense, so be it.

Depends how serious... If it won't be lethal even in the long run or really harmful then definitely.

Is there any chance of super powers?

I think probably the same chance as in real life