His Guards from Another Planet

Comet is from a planet where you can manifest abilities, but it's unheard of to manifest more then one. Do to this her planet was targeted in hopes of one day kidnapping her and using her as a weapon. She managed to defeat every attempt except one, causing her to wake up with her taker on the human planet. She then was sold to a human with her taker to guard a teenage boy. Will she manage to protect the boy, get back to her planet to see her friends and family, and end a war? Or will she fail in the process?