Danielle Hart, 16.

At first glance, she might not look like what people might expect a slayer to look, then again - which slayer really ever did?
She has a relatively short and petite build, with long dark hair usually held in a ponytail but sometimes braided or even left loose, and brown eyes. She is obviously Caucasian in ethnicity, but some slight darkness in her skin tone indicate some other ethnicity somewhere in her ancestry.
She usually dresses quite casually with either her favorite pair of jeans and a simple top, or a plaid, schoolgirl-esque, skirt.

She mostly gives the 'quiet shy girl' vibe, preferring to spend her free time reading, or practicing her violin or her piano, but is also quite a movie geek and would rarely say no to night of watching an especially trashy movie, or an super-artsy one no one ever heard of from places like Uzbekistan or Mongolia.

She is an only child, living with her parents and going to the local high-school where she has a few friends both female and male, but none too close, and usually manages to stay out of trouble and keep her grades high - but as duty calls - not always. In general, she tries to keep a low profile to avoid unneeded attention to herself.