A normal boy associated with the secret association, Libra. He has the "All Seeing Eyes of God" with the exchange of his sister's, Michella, eyesight.

Libra's Leader. He has a strong and stern aura around him due to his big build, but his demeanor is actually calm and gentlemanly. He is a master of the Brain Grid blood battle style.

A silver-haired and brown-skinned hot blooded man. He is good at taking care of the junior he is paired with. He is a master of the Big Dipper blood fighting style's Kagutsuchi branch.

An invisible werewolf. She has the power to decrease her presence. Her main job is to collect information, spy on enemies, and chasing down people.

A man in suits with an eye injury. He is the second in-command after Klaus. Being able to freeze everything with a kick, he is a master of the Esmerelda Blood Freeze.

A tall lady. She is excellent in her fighting abilities. Her Blood Battle Arts come from guns that creates electric shocks, putting down enemies and monsters with it.

A combat butler. An old man with darker skin, white hair and a mustache. His whole body is wrapped with the exception of his face.

A monkey that is capable of running at immense speed.