Merus is the number one elite patrolman of the Galactic Patrol and formerly a Trainee Angel.

At some point in the past, Merus was trained by the Grand Minister and sent to the Galactic Patrol in order to broaden his perspective and learn about the lives of mortals. During this time, he quickly ascended the ranks of the Galactic Patrol and became its most powerful soldier. His power greatly aided the Galactic Patrol, allowing them to capture more powerful criminals such as Saganbo and his Galactic Bandit Brigade.