Iron Woobie: Mugen. The Misguided Miscreants two-parter revealing his backstory gives him plenty of reasons to feel sorry for himself, on top of being betrayed by his childhood friend/possible love interest and nearly dying. But at any point does he let it get him down? No. He lets it make him angry. The man simply does not give a fuck.
Mugen: "I don't give a rat's ass about going to hell. I guess it's because I feel like I'm already there."