I know some people who write fiction fiction, but no fanfiction, sorry.
But let's see, 8theGreat does. Her man does, even though he doesn't get on anymore. Midna had a 潮流粉丝俱乐部 account once, even though that was a bit before my time. I know another guy who used to be on 潮流粉丝俱乐部 who does fiction fiction, but I can't remember for the life of me what his 用户名 was.