I'm Rin, I only have one character. Her name is Kel and she's a Nephilim (though she doesn't know what she is). This warrants her all the normal enhanced type abilities and she also had retractable black angel wings. She normally keeps the wings tucked away unless she's at home.
Kel's basically a sex, booze, smokes, drugs and violence addict. She's only 17 and pretty impressionable at this point but she's spent most of her life 'being bad' and doesn't really understand what it means to live correctly so to say. She's been pretty extensively abused for most of her life, so this only adds to her skewed world perspective. Kel tested out of high school and is sort of hanging around waiting for Spring semester of UC sunnydale to start even though she expects she'll probably just end up being a drop out because she doesn't think she's smart enough to cut it.
While she's not a slayer, I'd love to see someone try to be all watcher over her. Though I think there's a few slayers that may need watching all ready.