The Gate Guardian's Daughter

The interplanetary gates require guardians and the reformed demon Malthael is one of them. His adoptive daughter, Elisabeth, is special, but her dangerous ability hasn't awoken yet. Malthael knows it will one day and from then on her life will forever be altered. Malthael isolates her from outside world as much to protect everyone else as to safeguard her. It is all he can do to delay the inevitable. Now that Elisabeth is ten, how long can Malthael keep her confined?