Gender: Female Age: Mid-20s Build: 163cm / 45kg Appearance: - Black hair with light brown highlights in several places. - Black eyes and a beautiful appearance. Personality: Very confident and strong-willed. Traits: - Calls Unjeong 'Master' and follows him loyally. - Possesses the Eternal Heart, making her immortal (revives after death). Ability: Teleportation. When her heart rate increases (via caffeine jellies, caffeine, etc.), she can teleport to a desired location, though it doesn't last long. - Can teleport others or objects upon contact.

Gender: Male Age: Late 20s Build: 184cm / 74kg Appearance: Dark brown hair and black eyes, very handsome. Personality: Cold and quick-witted. Traits: Has feelings for Chaeni. Ability: Psychokinesis. A versatile ability to lift or throw objects and people with hand gestures, but overusing it leads to overload, causing nosebleeds or physical injury.

Gender: Male Age: Same as Chaeni Build: 178cm / 75kg Appearance: Black hair and eyes. Personality: Timid but sweet and kind. Traits: Chaeni's childhood friend. Ability: Superhuman strength. When he is upset, he gains terrifying strength and physical enhancement, becoming immune to most impacts.

Gender: Male Age: Mid-to-late 40s Build: 179cm / 73kg Appearance: Black hair and eyes. Personality: Grumpy and full of complaints, but surprisingly caring. Ability: Adhesion. If he tells a lie, anything will stick to his body; he can only detach them by telling the truth.

Gender: Female Age: Late 20s Build: 165cm / 45kg Appearance: Black hair and eyes. Personality: Cold and clinical, but kind to the Wunderkinder. Traits: Hearing impaired, wears a hearing aid. Ability: Brainwashing. Causes veins to bulge in the target's neck and forces them to answer. As a side effect, her hair turns white.

Gender: Female Age: Mid-20s Build: 165cm / 45kg Appearance: Black hair and eyes; her left eye is white because it shows hallucinations. Personality: Acts like a brat but is secretly cold-blooded. Traits: Calls Ha Wondo 'Father.' Has a strange crush on Unjeong. Ability: Hallucinations. Can cast illusions on people. As a side effect, the area around her eyes turns blue.

Conducts experiments on humans.

Gender: Male Age: Early 30s Build: 181cm / 73kg Appearance: Black hair and eyes. Personality: Cold and clinical. Traits: The eldest; calls Ha Wondo 'Father' and looks after Juran and Horan. Ability: Gravity manipulation. Can crush targets by generating gravity and anti-gravity simultaneously. As a side effect, his upper body hardens like stone.