Nobu here once again to introduce a character whose spoilers are kind of unavoidable, then again they're spoilers that are kind of obvious from the start... so maybe it's not that spoiler-ish. (I'll leave out actual story info at least.) With that said, I'm bringing in Toto, aka "Mockingbird" from Deadman Wonderland. He's mostly based off the manga canon rather than the anime. (I like the Deadman Wonderland anime too, but it leaves out so many things, that's all.) He might seem odd to people because he's always so cheerful and never offended, but he's actually completely nuts, an extreme sadist and is a manipulative mad scientist. To be honest I am questioning my own sanity for wanting to play him. He uses his blood as a weapon and has no problem getting his hands filthy. Don't bother reasoning with him about personal space because he will be all up in anyone's personal space if he's enjoying himself or curious because he has to spread his "love". Your guess on what that means is as solid as his own guess: he has no idea.
Warning: he tends to randomly lick people to get to know them better or if he wants to try to copy their abilities by tasting their blood, but unless another Deadman is ever around he wouldn't be able to do the latter really; he might possibly be able to do a weaker imitation of more basic things that his blood can form.
Anyway, at any time his limbs can fall off, but no worries, he just sews them back on. Also I should probably mention he's a cannibal; not 100% of the time, but he has no issues eating people at all because they're filled with useful blood to keep his body healthy and make him feel stronger sometimes. They're delicious too, aside from everything sweet.
Feel free to plot anything with this weirdo. He can possibly be with the villain club, but he might be too insane to actually have a side. Either way, I don't think the whole cannibalism thing will fly well with the good folks if they found out...