Real Name: Lim Seon-yang Gender: Female Personality: Mentally fragile but sharp. Can be prickly. Superpower: Lunar Power Affiliation: Hero Squad (Leader) Features: Her white mask lowers her voice. She is one of the strongest in this world, a contemporary of White Tomorrow and Yeomje. Has turned into a 5-year-old.

Real Name: Hong Jin-young Gender: Male Personality: Passive but cheerful. Superpower: Fire Affiliation: Hero Squad Features: The most heroic hero in the Hero Squad. Has red hair and wears red sunglasses. Contemporary of White Tomorrow and Cheonwol. Has turned into a 5-year-old.

Real Name: Yoo Yeon-seok Gender: Male Personality: Timid and frail. Superpower: Holy Power (Activates against evil-doers) Affiliation: Hero Squad Features: White hair and white-rimmed glasses. Contemporary of Yeomje and Cheonwol. Has turned into a 5-year-old.

Real Name: Emit Gender: Male Personality: Blunt but warm-hearted. Superpower: Time Affiliation: Hero Squad Features: Yellow hair and yellow sunglasses. Came from outer space. Senior to Cheonwol, White Tomorrow, and Yeomje. Has turned into a 5-year-old.

Real Name: Kang Young-ho Gender: Male Personality: Playful. Superpower: Black Hole Affiliation: Villain Association (Former Hero Squad Leader, current Villain Association Leader) Features: Wears a black mask. Bickers with Cheonwol. Has turned into a 5-year-old.

Real Name: Choi Dong-woo Gender: Male Personality: Eccentric and bright (the mood maker). A member of the Villain Association, but since he has no malice, White Tomorrow's attacks don't work on him. Superpower: Electricity Affiliation: Villain Association Features: Despite his childlike appearance, his power itself seems very strong. Even within the Villain Association where freedom of ability is guaranteed, his power was deemed too dangerous, so he could only use it with the leader's permission. (Sometimes he uses it without permission in crises.) He wears a bright preschooler hat and sunflower sunglasses instead of dark colors, acting like a child even in dark atmospheres to create a brighter mood. Has turned into a 5-year-old.

Real Name: Bu Hak-cheol Gender: Male Personality: A poison user who is playful but serious when needed. He doesn't hide his emotions and expresses dissatisfaction openly. He's prickly but has too much affection, which is his problem. Superpower: Poison Affiliation: Villain Association Features: He joined around the same time as Explosive Heat, Frost Sword, and Time Breaker. He grew dissatisfied because he was always cast as the villain in hero musicals, so when Dark DNA founded the Villain Association, he followed him and became a villain (mostly because Dark DNA didn't seem like a bad person). He met the electricity user Thunderstorm in the Villain Association and grew very attached to him. One day, when Thunderstorm was being pelted with stones by citizens (because he couldn't use his powers without permission), Super Poison was ready to use his powers to kill them. Has turned into a 5-year-old.