Mytherica, one of the admins on this wiki, has a whole load of RP characters and here's the list with a link to each page. It may not have ALL of them but, it will have quite a few. Most of these are original but have a trait taken from a book or game or Mytherica themselves. Have fun reading, this will probably help if you go to the chat to RP.
This is a work in progress, the pages aren't all made yet.