Helena

Former vampire slayer, current vampire. She was turned by accident, as someone thought it would be good to quickly snack on her, on her very first attempt to kill a vampire all on her own. Normally this wouldn't turn anyone, but, well... She accidentally set the house on fire, and died from said fire before the bite had any chance to heal. And that's usually enough to turn someone. 

The slaying attempt failed, obviously, but hey, now she's using her vampire status and slayer knowledge to her advantage. Sure, she didn't have a lot of experience, but she did get a crash course in it before the Attempt. She knows what the slayers use to slay vampires. She knows how to avoid getting slayed. 

Quite ambitious and driven, has leader-like qualities. Also slightly reckless sometimes. Still, she's quite respected among most vampires at this point. Can and will tell you no. Does not really care what you think. Fairly petty at times.

Might have worked at a bloodbank for some time? Got fired once they found out she was secretly stealing bloodbags from her workplace, though. 

Also, she has fire powers.