The Dalphina Nocte Trials

Delphina Nocte has vowed to do everything in her power to kill her father after he murdered her twin brother. She takes it upon herself to become a spy for Dumbledore. Anything to get back at her father for what he did. I know it's a lame explanation, but give it a shot? This story will try to follow the books as closely as possible of course it will be from the other side