Real name: Kazuki A homunculus who wears a Philosopher's Stone as a necklace. Appearance: Red eyes, black clothes, Philosopher's Stone around his neck, black hair. Male. Second son. Represents Pride of the Seven Deadly Sins. Said to impose pride upon all things. He absolutely loves his brothers. 11th grade. Seems like a popular guy, but maybe not.

Real name: Tsuguki Male. Third son. Represents Greed of the Seven Deadly Sins. A homunculus who wears a Philosopher's Stone as a necklace. Appearance: Wears glasses. Heterochromia (right eye black, left eye red), black hair, Philosopher's Stone around his neck, black clothes. A missionary of magic from the outside world; the first to use magic in a world without it. Ability: Magic (presumably). Personality: Neither quiet nor overly bright. 11th grade.

Real name: Mitsuki Male. Fourth son. A homunculus. Possesses a Philosopher's Stone and wears it as a necklace. Appearance: Black hair, red eyes, black clothes. Represents Sloth of the Seven Deadly Sins. Ability: Sees results and can bend them. One who seeks results and erases the process; he even transcends the process of death. Personality: Playful. 10th grade. Popular guy.

Real name: Yoshiki Male. Fifth son. Represents Lust of the Seven Deadly Sins. Ability: Release. A homunculus who wears a Philosopher's Stone as a necklace. Brings a woman to his room once a month. Appearance: Long black hair, red eyes, black clothes. Dislikes Father a little. Soft-spoken. Personality: Kind (?) 10th grade. Popular guy.

Real name: Itsuki Male. Sixth son. Represents Gluttony of the Seven Deadly Sins. Can manifest things he ate that day as part of his body. A homunculus who wears a Philosopher's Stone as a necklace. Appearance: Black hair (somewhat long), black horns, red eyes, black clothes with a red rose on the chest, Philosopher's Stone around his neck. Ability: ??? 9th grade. Seems like a popular guy, but maybe not.

Real name: Mutsuki Male. Seventh son. Represents Envy of the Seven Deadly Sins. Depending on his mindset, he can be strong or weak. His main combat style involves mimicking the abilities of those he cuts with a red naginata generated within his body. Ability: Copy. Can mimic up to three abilities of things cut with his naginata. Appearance: Long black hair, very pale pink eyes, black clothes. A homunculus who wears a Philosopher's Stone as a necklace. 9th grade. Popular guy.

Real name: Nanaki Eighth son. A master of the blade, a swordsman. Represents Wrath of the Seven Deadly Sins. A homunculus who wears a Philosopher's Stone as a necklace. Appearance: Black hair, red eyes, black and white clothes, Philosopher's Stone around his neck. Ability: ??? 9th grade. Seems like a popular guy, but maybe not.

Male. Always resides within Rei, appearing only when Rei is in danger. Refers to Father as "that shitty old man." Ability: Inversion. A homunculus. Appearance: White hair, black clothes. Personality: Reliable.

Male. A homunculus who wears a Philosopher's Stone as a necklace. Ability: Inversion. The eighth sin: Humanity. A sin created from insane theories and personal dogmas. Primarily uses a tachi sword. Appearance: Black hair, red eyes, black clothes, Philosopher's Stone around his neck. Personality: Kind. Occasionally uses polite speech. 7th grade.

A teacher. He treats ordinary students normally, but drops his polite speech when in front of No. 1, 2, 3, 4, 5, 6, 7, and Rei. Ability: ??? Father to them all.