The Monster Within

Chelsy is a normal girl with a power that can either destroy everyone or help everyone. She was a descendent from Acathy the Demon Queen. Thankfully, her powers haven't awakened yet, but after her parents deaths, it's pretty hard for her to keep the evil inside and sealed away from the Kingdom, villages, and her brother. Her brother is the only one who has been able to stop the transformation. Her brother is the only happiness she has left. What happens to her? Will she become evil or the person who saves the Kingdom?