I'm a streetwise thief who hates nobby nobles and those other influential people because of some harsh mistreatment I received in the past, and even despise my father for being the one to put the torch to our village, but I pride myself for being a chivalrous thief, stealing only from nobles.
...I'm actually a bit abrasive and frequently try to steal from our own allies, but I take a genuine liking for them... and sometimes I even give them back what I stole.
I carry a dagger and a lockpicker.