Here's a character I've come up with. Let me know if it needs to be altered somehow (it would be nice if there was a job for him other than being a waiter).
Name- Adrian Decker
Personality- Adrian is generally friendly, but usually appears to be simple-minded or unobservant.
Strength- He has talent for lying and manipulating; can resist vampire mental influence to a limited degree. He has some hand-to-hand and weapon skills, but is only dangerous by human standards. He also has an assortment of breaker and entering skills.
Weakness- Has a geas on him that can be activated by the Coven at any time, killing him. He is in a dangerous position with few defenses if he is ever caught.
Bio (Why you are what you are)- Adrian is a spy working for the Coven. He was raised from a very young age to be loyal to them, and has undergone mental conditioning to ensure his loyalty.