Gender: Female Species: Archdemon of Terror Resides in Room S-4. Appearance: Pitch-black skin that seems to absorb all light, sharp teeth, black pupils with pale yellow sclera, long black hair matching her skin tone, three pairs of demon wings in the same color, a large black snake tail, and a yellow tongue. She has black goat horns, sheep horns, and curved demon horns. She has four arms and long, pointed fingertips. She wears a subject uniform with restraints, her mouth is torn, and she wears a pale yellow bonnet. She is the tallest among the subjects, standing nearly 4 meters tall, and possesses an elegant air. Abilities: Fear manipulation, fear control, fear creation, and mind control. Personality: The scariest among the Youngins, but kind and gentle to her teammates. She acts like the team's maid (simply because she wants to). She uses profanity but gets flustered and doesn't know what to do if a teammate gets hurt. Subject.

Gender: Female Species: Purple Wolf-kin (Formerly a Grim Reaper who committed a massacre). Resides in Room S-4. Appearance: Beautiful, long light-purple hair, wolf ears and tail, sea-blue eyes. Her hairstyle is one of four: half-up, ponytail, bun, or waves. She has sharp teeth and the jaw strength of a wolf. Wears a subject uniform. Abilities: Soul manipulation, superhuman strength (When black liquid flows from her forehead and covers one eye, she reaches 100% output, amplifying her strength up to 100 times), animal transformation, and sonic speed. Personality: Bold, courageous, and swears a bit. When she gets extremely angry and enters serious mode, a faint image of a traditional Korean hat (gat) appears above her head. She snaps instantly if a teammate is injured. In a virtual marriage with Chocookie. Leader of the Youngins. She doesn't hit people randomly and knows how to take care of others. Subject.

Gender: Female Species: Pale Pink Fallen Angel Rabbit-kin (Formerly an angel). Resides in Room S-4. Appearance: Cute and beautiful, pale pink short hair with drooping dark pink ears. Heterochromia (white and reddish hot pink eyes), a cat-like mouth (ㅅ-shaped), a small cross pattern under one eye, and a small moon pattern under the other. She has small white angel wings. She wears white '=' and 'X' pins in her hair along with a carrot pin. She wears a black ribbon around her neck and a subject uniform. Abilities: Fallen angel powers, healing, dream manipulation, and light. Personality: Kind, friendly, and gentle. She heals the team and worries when they are hurt. She is good at situational analysis. Subject. Has a younger sister, Morning. In a virtual marriage with Hee-eun. Good at drawing. Member of the Youngins.

Gender: Male Species: Purple Shark-kin. Resides in Room S-4. Appearance: Handsome, purple hair with a shark fin on his head, a shark tail, purple eyes, a purple scarf, shark teeth, and a subject uniform. Abilities: Gaming (Can use abilities from games for about 5 minutes with a 30-second cooldown), darkness, weapon summoning (including game weapons), and telekinesis. Personality: Can be wicked at times but is smart and has the sheer audacity to say "So what?" when interrogated. Has a cat allergy. Subject. Good at utilizing his abilities and is an excellent marksman. Member of the Youngins. He is so good at reading the flow of a situation and rigging bets in his favor that he once forced Hee-eun and Mirror to act cute as a penalty.

Gender: Female Species: Matcha Cat-kin. Resides in Room S-4. Appearance: Cute, long lime-green hair and eyes, cat-like mouth, subject uniform with oversized sleeves. She wears a lime-green ribbon pin and a white cat pin. She has small cat whiskers on her cheeks. Her eyes are sparkly, she has an ahoge (cowlick), and sharp teeth. Strangely, she lacks cat ears and a tail. Abilities: Hypnosis, hive mind (swarm control), wood manipulation (can bind opponents with trees; no limit on the type of wood), and portal summoning (ranging from small portals for short distances to portals that travel through space-time or parallel universes). Personality: Cute, kind, and has a tiny bit of aegyo. She screams immediately when startled. Very cheerful. Subject. Chocookie's younger sister. Her eyes glow brightly when using her abilities. Member of the Youngins. The youngest of the group.

Gender: Male Species: Human. Resides in Room S-4. Appearance: Handsome, black hair and black eyes. Wears a '67' hairclip, a black hoodie (white on the inside), black headphones, a subject uniform, and has sharp teeth. Abilities: Probability manipulation (Can set the hit rate of an attack between 0% and 100%), ability copying, precognition, and explosion. Personality: Brave and bold. Sometimes spaces out. Has a bright personality and swears a little. Subject. Member of the Youngins. Hates losing.