The heart of a demon

Ashley is a girl that is part of a banned tribe that was banned from the "main city" because they have the power to tame demons who can transform into weapons and back in the day the tribe were blood thirsty killers. But Ashley is the odd ball out usually kids in the tribe tame a demons at 13 and she's 17 also when she was younger she had her memory and her parents completely avoid the subject of her childhood. One day the "main city" burns the village down and she's the only survivor. And she meets a strange demon named Peter that swears to protect her with his life. Soon after she joins up with Peter on a quest of revenge to find the killers while slowly re-gaining her memories.