Short for Jeong Kangji. Gender: Female. Appearance: Long hair, dark grey on the outside and pastel sky blue on the inside. Amber eyes. Personality: Appears chic when uninterested or quiet. A tsundere who takes care of others while grumbling. Has a playful side. Surprisingly(?) shy. Body: 172cm (tall for a woman), 53kg, D-cup. Ability: Elements (Fire, Water, Wind, Earth, Lightning, Gold, Silver, Liquid Nitrogen, Hydrogen, Radiation, etc.). Grade: SR. Has been in a relationship with Kim Blue for 6 years. 3rd Year.

Gender: Male. Appearance: Dark sky blue hair and eyes. Personality: Playful and kind tsundere. Body: 180cm, 80kg. Ability: Nuclear. Can fuse nuclei to cause explosions or manipulate nuclear energy. Grade: SR. Has been in a relationship with Kangji for 6 years. 2nd Year (Calls Kangji 'Noona' but does not use formal speech like 'Hello').

Full name is SmallBrain. Gender: Male. Appearance: Yellow hair, yellow eyes. Personality: Looks like a quiet model student but is very playful. Expresses emotions like ㅡㅅㅡ. Body: 175cm, 70kg. Ability: Lightning. Grade: S. 1st Year.

Gender: Female. Appearance: Long pink hair, pink eyes. Has rabbit ears. Personality: Cute, playful, and occasionally cool(?). Body: 165cm, 40kg, C-cup. Ability: Cherry Blossoms (Can charm and attack with cherry blossoms. Can create sharp weapons like katanas or even guns from blossoms). Grade: SS. In a public relationship with Dali. ❤️ 2nd Year.

Gender: Male. Appearance: Yellow hair, yellow eyes. Personality: Kind yet full of mischief, with strong leadership qualities. Body: 174cm, 67kg. Ability: Moon (Uses weapons made of moonlight). Grade: SR. In a public relationship with Yoruru. ❤️ 2nd Year.

Gender: Female. Appearance: Long black hair. Odd-eyed with a red left eye and a black right eye. Has black cat ears. Body: 149cm, 40kg, D-cup. Personality: Playful, kind, and very warm-hearted. Ability: Blood (Manipulates blood. It comes out of her wrists, but she creates it rather than using her own blood). Grade: S. 3rd Year.

Gender: Male. Appearance: Black hair, black eyes. Personality: High tension and loud. Body: 170cm, 68kg. Ability: Light. Grade: SS. 2nd Year.

A teacher who can't do much because their grade is lower than the students, so they only explain theory.

Gender: Male. Appearance: Grey eyes, grey hair. Ugly. Personality: A total woman-chaser. Thinks he's handsome. Body: 160cm, 80kg. Ability: Insects (Summons mosquitoes). Grade: None. Not an ace, so has no grade. Just below S. 3rd Year (Actually 40 years old but faking it).

Gender: Female. Appearance: Long orange hair, orange eyes. Ugly. Personality: A total man-chaser. Thinks she's pretty. Body: 130cm, 50kg, A-cup. Ability: Gumiho Transformation (10 seconds). Grade: Below S. 3rd Year (Actually 30 years old but faking it).