Darkness

Abused since the day of her birth, born a Guardian. Guardians are protectors of the mortal realm, the invisible saviors of humans, Half Angel Half Human, they are strong and flawless. Only some like her are different, born of Pure Angel and Fallen she is different, more sinister more able to succumb to the darkness that seeps through her soul.
When her father goes rouge and orders his men to capture his daughter and kill her mother, the shit hits the fan.
she is forced to go back to The Institute a school for guardians, but if they think she is going to go calmly and quietly they have another thing coming.