The leader of the Rival Heroes. Male. His primary weapon is an RPG. He has a playful and energetic personality, but he is absolutely merciless toward villains and takes great care of his teammates as a leader should. Age 21. 178cm/68kg. Black hair and black eyes. He usually wears a black zip-up hoodie or combat gear. His ability is Fire. When used with his RPG, the firepower is immense.

The oldest member of the Rival Heroes. Male. His primary weapon is a shotgun. He finds everything bothersome and is always tired, but he enters full combat mode the moment his teammates or villains are involved. Though blunt, he looks after his teammates like a reliable eldest brother. Age 24. 180cm/63kg. Blonde hair and black eyes. He always wears a suit. He is a dog beastman with yellow dog ears and a yellow dog tail. As a beastman, his five senses are acute (his ability is X-ray vision, so his sight is the most sensitive). Ability: X-ray Vision (excessive use causes vision deterioration).

A member of the Rival Heroes. Male. His primary weapons are a bow or a sniper rifle. He is playful and has the temperament of a casanova, making him popular with women. He has a sly side. He loathes villains. Age 21, the same age as Lee Pinggu, and is a rival to Sarang. 177cm/59kg. Long white hair and purple eyes. He wears a large white ribbon on the back of his head. He mainly wears white or light-colored hoodies or combat gear. Ability: Teleportation (can teleport others upon contact).

The youngest member of the Rival Heroes. Male. His primary weapon is a gunblade. Rather than being emotional, he is rational and often delivers blunt, painful truths. He is openly hostile and shows his dislike toward villains (he is so rational that the villains have given up on trying to shake him emotionally). Age 20. Being the youngest, he is doted on by the older members. Often called U-Cham for short. 181cm/61kg. Secret two-tone hair mixed with white, and blue eyes. He usually wears combat gear. Ability: Mind Reading.

A member of the Rival Heroes. Male. He is a master of the sniper rifle. He is in a rivalry with Mano, the sniper master of the villains. He is infinitely generous toward his teammates but shows open contempt for the villains he hates. He is more emotional than he looks and is often shaken by the villains' words. He is the one who wants to bring Chester back the most. Age 22. 179cm/63kg. Purple hair and purple eyes. He wears a dark purple beret with horns. Ability: Time Stop (up to 2 minutes).

The leader of the Rival Villains. Male. His ability is Brainwashing, which he used to brainwash Chester. His weapon is a sniper rifle. He is playful and sly, but rational and quick-witted in battle. White hair and black eyes. He has small black demon horns on his head. He usually wears a white hoodie with a black t-shirt underneath or combat gear. Age 22. He finds the heroes' desperate attempts to bring Chester back amusing. He is in a rivalry with Hood. 182cm/68kg.

A member of the Rival Villains. Male. His ability is Mind Control, a mental-type power similar to Mano's. His primary weapon is a bow, and he is Somyeol's rival. He is playful at all times, but no one who has crossed him has been seen alive. Age 22. 176cm/66kg. Green hair and green eyes. He walks around in a pink dinosaur hoodie. He doesn't seem to care for combat gear.

The oldest member of the Rival Villains. Male. His ability is Psychokinesis. The duration is short, but the range is wide. His primary weapon is a sniper rifle, and he is a rival to Hood. He pranks others often but is easily provoked by insults or taunts. Age 23. 180cm/68kg. Blue hair and blue eyes. He wears green goggles on top of his head.

Formerly a member of the Rival Heroes, he is now the youngest member of the Rival Villains after falling under Mano's brainwashing. Male. His primary weapon is a dagger for close-quarters combat. He acts like an emotionless robot, following the orders of Mano or Sarang. He cannot understand the heroes who look at him with longing eyes. Age 20. 172/62. Black hair with bangs that cover his eyes. He wears a black beret and has horns.