Blood Magic (Abnormals Underground #1) by Holly Hook

Turned into a vampire at the age of two, Alyssa has spent the last 14 years pretending to be human in a society who hates “Abnormals” like her. She’s done just fine gossiping with the other girls, wearing pink, and becoming an expert sword fighter in order to vent her killer instincts.

But then the Mage Xavier shows up at her school and introduces her to a whole other reality under her feet—Abnormals Underground, an entire society of supernatural beings hiding under the city of Cumberland. Alyssa can ignore his pleas for her to join them as a warrior—for about two hours. When her father goes missing, Alyssa will have no choice but to become a part of the world she’s fought to avoid her entire life if she’s to get him back from the mayor of Cumberland. That wouldn’t be so hard, except that it turns out he’s a demon bent on world domination.