The leader of the Rival Heroes. Male, primary weapon is an RPG. He has a playful and active 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. Usually wears a black zip-up hoodie or combat gear. Ability: Fire. When used with his RPG, the firepower is insane.

The oldest member of the Rival Heroes. Male, primary weapon is a shotgun. He finds everything annoying and tiring, but enters combat mode immediately if it involves his teammates or villains. Though blunt, he takes good care of his teammates like an eldest brother. Age 24. 180cm/63kg. Blonde hair and black eyes. Always wears a suit. Ability: X-ray vision (excessive use causes vision loss).

A member of the Rival Heroes. Male, primary weapon is a bow or sniper rifle. He is playful and a natural Casanova popular with women. He has a sly side. He despises villains. Age 21, same age as Lee Pinggu, and is a rival to Sarang. 177cm/59kg. Long white hair and purple eyes. Wears a large white ribbon on the back of his head. Mainly wears white hoodies or combat gear. Ability: Teleportation (can teleport others upon contact).

The youngest member of the Rival Heroes. Male, primary weapon is a gunblade. Rather than being emotional, he is rational and often makes blunt, bone-chilling remarks. 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 Ucham for short. 181cm/61kg. Secret two-tone hair mixed with white and blue eyes. Mainly wears combat gear. Ability: Mind reading.

A member of the Rival Heroes. Male, a master of the sniper rifle. He is in a rivalry with Mano, the sniper expert 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. Wears a deep purple beret with horns. Ability: Time stop (up to 2 minutes).

The leader of the Rival Villains. Male. Ability: Brainwashing, which he used to brainwash Chester. Weapon: Sniper rifle. Playful and sly, but rational and quick-witted in battle. White hair and black eyes. Has small black demon horns on his head. Usually wears a white hoodie with a black t-shirt underneath or combat gear. Age 22. He finds the heroes' desperate struggles to bring Chester back amusing. Rival to Hood. 182cm/68kg.

A member of the Rival Villains. Male. Ability: Mind control, a mental-type power similar to Mano's. Primary weapon is a bow, and he is a rival to Somyeol. He is playful at every moment, but no one has ever survived after getting on his bad side. Age 22. 176cm/66kg. Green hair and green eyes. Wears a pink dinosaur hoodie. Combat gear? He couldn't care less.

The eldest member of the Rival Villains. Male. Ability: Telekinesis. The duration is short, but the range is vast. Primary weapon is a sniper rifle, and he is a rival to Hood. He plays pranks often but is easily provoked by insults or taunts. Age 23. 180cm/68kg. Blue hair and blue eyes. Wears green goggles on top of his head.

Formerly a member of the Rival Heroes, but fell under Mano's brainwashing and is now the youngest of the Rival Villains. Male. Primary weapon is a dagger; a close-quarters specialist. 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. 172cm/62kg. Black hair with bangs covering his eyes. Wears a black beret and has horns.