Mumen Rider (無免ライダー, Mumen Raidā) is the C-Class Rank 1 professional hero of the Hero Association.

Appearance:
Mumen Rider is a young man of average height and weight. He wears an armored suit, with brown armor covering his torso and shoulders. He has a black leather suit under the armor and black gauntlets and knee pads. He also has a green bicycle helmet and dark-shaded goggles. Underneath his helmet and shades, he has short, brown hair and oval-shaped glasses that obscure his eyes.

Personality:
Mumen Rider is an extremely brave, loyal and honorable hero who refuses to overlook any crime, no matter how minor or insignificant it may be, or back down from any fight, no matter the opponent. He is incredibly determined and never backs down, even at the cost of his own life. He is perfectly willing to give his own life if it means protecting innocent people from evil, even when it is clear he has absolutely no chance of success.

Abilities:
Justice Tackle (ジャスティスタックル, Jasutisu Takkuru): Mumen Rider tackles his opponent.
Justice Punch (ジャスティ殴り, Jasuti Naguri): Mumen Rider punches his opponent.
Justice Kick (ジャスティスキック, Jasutisu Kikku): Mumen Rider kicks his opponent.
Justice Crane High Kick (ジャスティス・クレーンハイキック, Jasutisu Kurēnhaikikku): Mumen Rider kicks his opponent.
Justice Crash (ジャスティスクラッシュ, Jasutisu Kurasshu): Mumen Rider uses "Justice" as a projectile, hurling his bicycle at his opponent.