http://www.fanfiction.net/s/1675525/1/Roulette It’s set before the beginning of the game, and it’s about Setzer. The author seems to mostly write one-shot character studies, that are pretty fun to read.
I’m posting this here cause I really liked it, and I desperately want to be able to talk to someone about it. Also because there’s been a few threads discussing the potential merits or lack thereof in fanfiction, and I feel like this is both a strong example and a small time commitment.