Rose is a dhampir from the Vampire Academy books, which means she is part human and part mortal vampire. She does not have fangs, not does she drink blood, but she IS preternaturally stronger and hardier. She's a natural athlete and has about two decades of combat training - specifically in how to kill immortal vampires from her world, but also just melee combat in general.
Rose is snarky and sarcastic. She's smarter than most people would suspect, including herself. Dhampir in her world are essentially canon fodder soldiers, so she'll probably get along well with other soldier/spy types.
Rose comes from an AU timeline, which is only really relevant if you know the VA series of want to bring her a castmate (particularly from Last Sacrifice of later), but you can read more about that and her in general in her app.
She's going to be a little paranoid and mistrustful, especially at first, but I am looking forward to establishing some friendships, etc!