One

In the fantasy world of Andromeda, twins are pretty rare. But when they are born, each twin is good and bad. So once they get to a certain age, they are taught to control their powers for the greater good. But if the evil twin decides or somehow is unable to control their power and creates chaos, they are thrown in jail and the good twin gets their memories erased and live a human life instead of their original life because without the other twin, it's pointless.

Which enters Arianna and Fay. Fay escaped and is seeking revenge. She kidnaps the parents and makes Arianna come back home to gather her memories to know who she really is.