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. As a leader, he takes great care of his teammates. 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 bothersome and is always tired, but he enters full combat mode when it comes to his teammates or villains. Though blunt, he takes good care of the team 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).

Member of the Rival Heroes. Male, primary weapon is a bow or sniper rifle. He is playful and a natural Casanova who is popular with women. He has a sly side. He despises villains. Age: 21, same age as Lee Pinggu and rivals with Sarang. 177cm/59kg. Long white hair and purple eyes. Wears a large white ribbon on the back of his head. Usually 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. He is rational rather than emotional and often makes blunt, bone-chilling remarks. He is openly hostile and shows his dislike for villains. (He is so rational that 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 (white mixed with white) and blue eyes. Usually wears combat gear. Ability: Mind reading.

Member of the Rival Heroes. Male, a master of the sniper rifle. He is in a rivalry with Mano, the villain's sniper expert. He is infinitely generous to 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 dark purple beret with horns. Ability: Time Stop (up to 2 minutes).

Leader of the Rival Villains. Male. Ability: Brainwashing, which he used to brainwash Chester. Weapon: Sniper rifle. He is playful and sly, but rational and quick-witted in battle. White hair and black eyes. Has small black devil 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 attempts to get Chester back amusing. Rivals with Hood. 182cm/68kg.

Member of the Rival Villains. Male. Ability: Mind control, a mental-type power similar to Mano's. Primary weapon is a bow, making him Somyeol's rival. He is playful at all times, 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. He doesn't seem to own any combat gear.

The eldest member of the Rival Villains. Male. Ability: Psychokinesis. The duration is short, but the range is wide. Primary weapon is a sniper rifle, making him 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. Wears green goggles on his head.

Formerly a member of the Rival Heroes, but now the youngest of the Rival Villains after falling under Mano's brainwashing. Male. Primary weapon is a dagger for close-quarters combat. He acts like an emotionless robot, following the orders of Mano or Sarang. He doesn't 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.