She is a bit of a loner, but is desperate to make a friend. She always seems to be rejected.
She is shy, but when she opens up, she is kind, true to her friends, and stands up for what's right, even if she may get into deep trouble. She can be hard headed, but listens to other options.
Carries around her trusty wand of course.
Has been on the run before she was accepted. The rest will be played out.