Crim was one of the founders of the Crimson Knights. He is a Long Arm of tremendous skill and power.

Crim is a very happy-go-lucky player. He enjoys living on the edge and testing his skills against strong monsters. As a self-proclaimed defender of justice, he never turns down a chance to help somebody in need, especially not if that person is a pretty girl. He used to be a member of the Crimson Knights, but left when he felt that it was tying him down. He prefers to keep the real world and the game world separate, and will take breaks from the game if he feels it's getting to be too bothersome. He is close to Subaru, who he founded the Crimson Knights with and appears to share romantic feelings for her. He has a bit of a rivalry with Silver Knight, though most if it is on Silver Knight's side, not his.