Tielle is an OC from a story I've been working on for... way too long... I tend to throw her into scenarios and use play by post rp as an outlet to develop her character a bit and think outside the box as to how she might react to things outside of my control.
She's a bit abrasive at first, but ultimately a good person once you get past the entitled bratty exterior, though she's certainly mellowed out a bit over the years. Considering herself a bit of an intellectual combined with a penchant for pushing people and challenging their paradigms, she's usually keen on offering advice, or turning a situation around looking at it from another angle, whether you asked for her input or not.
While she does have supernatural abilities (she is a vampire after all) she's not without her shortcomings. She has a bit of a temper under the right circumstances, and suffers from some pretty deep seated guilt regarding her past.