Edited the wiki page to link back to the Blacks.
SR, the history you have is great. I actually like it. There's enough madness on Nepleslia that the scenario you draw out is plausible.
However, I'm with Aendri on this: It doesn't belong in the character's biography.
You should be able to sum it up in a paragraph or two. Shorter paragraphs, in fact. Basically, he joined a gang, had a partner, partner was with his sister, sister banged his best friend, partner killed best friend and beat sister, he saved his sister, got torn up (physically) by it, then went out to be on his own and badass 'cause his sister's likely dead.
You're giving away too much in the biography and making it hard for people to access the bio. Later on, when he's revealed parts of it, you can add those pieces back in.
He's been a bounty hunter for five years, so that likely justifies the skills.