She-Ra: Princess of Power

The kidnapped daughter of Queen Marlena and King Randor of Eternia (characters from He-Man and the Masters of the Universe), Princess Adora grew up on Etheria. There, she lead an evil army until the day her long-lost twin brother, Prince Adam (He-Man), came to tell her who she really was. As her alter ego, She-Ra, the princess protects Etheria by fighting the forces she once worked for.