Gender: Female Subject No. 218 Age: 22 Experiment Site: Both ears. Height: 164cm Appearance: Two white braided pigtails, purple eyes, star hairpins. Personality: Originally cheerful, but became quiet after becoming a test subject. Features: Flowers bloom in her ears; she is deaf and in pain. She helps others a lot. Test subject, member of Team Nappa.

Gender: Male Subject No. 710 Age: 21 Experiment Site: Right arm Height: 172cm Appearance: Sky blue hair, goggles, sky blue eyes. Personality: Cool and quiet. Features: His right arm turned into a black monster arm and flowers bloom on it. He doesn't speak much. Test subject, member of Team Nappa, calls Mellow 'Mel-nim'.

Gender: Male Subject No. 001 Age: 20 Experiment Site: Head Height: 180cm Appearance: Beige hair, brown eyes. Personality: Cool and quiet. Features: A flower blooms on the left side of his head. He is the only one who cannot feel pain. Test subject, member of Team Nappa, calls Mellow 'Mel-nim'.

Gender: Male Subject No. 117 Age: 20 Experiment Site: Mouth Height: 178cm Appearance: Pink hair, star-shaped sunglasses, sky blue eyes. Personality: Cool but talkative. Features: Flowers bloom in his mouth. He has become unable to speak. Test subject, member of Team Nappa, calls Mellow 'Mel-nim'.

Gender: Female Subject No. 613 Age: 20 Experiment Site: Torso Height: 160cm Appearance: Black hair in twin tails, blue valkyrie accessory, black star eyes. Personality: Very fearful. Features: Flowers bloom on her torso. Due to the flowers, her black star eyes changed to plain black eyes. Test subject, member of Team Nappa, calls Mellow 'Mel-nim'.

Gender: Male Subject No. 624 Age: 18 Experiment Site: Left eye Height: 170cm Appearance: Black hair, 'r' hat, black eyes. Personality: Talkative. Features: Became quiet after flowers bloomed in his eye. He was the first to bloom. Test subject, member of Team Nappa, calls Mellow 'Mel-nim'.

Gender: Female Age: 21 Height: 162cm Appearance: Pink hair, goggles, sky blue and pink cross-shaped pupils. Personality: Loves experiments and has a streak of madness. Features: The researcher who turned the others into 'vegetative' states. She calls subjects by number instead of name and always records results in her notebook after an experiment.