Glimmer

Princess Glimmer is the princess and commander of Bright Moon, as well as a leader in The Rebellion. Later, she, Adora, and Bow succeed in establishing the new Princess Alliance, in which they are both avid members. As of Season 3, we may assume that Glimmer is now the leader of the Rebellion and leader of the Princess Alliance, since her mother is now trapped in a space-time portal. She became the new Queen of Bright Moon in Season 4, then an antihero as the season progressed and then a prisoner of Horde Prime along with Catra during the season finale.