Real name: Sigma Naki. A member of the Numa race. He has a foul mouth and a listless personality. He was once consumed by darkness and committed massacres as the "Grim Reaper," but has since reformed. He wields a purple scythe and manipulates the darkness attribute; when he releases his power, purple patterns and wings appear, along with a Σ mark in his left eye.

Always wears sunglasses. She consistently ends her sentences with "bachi," such as "...bachi?" or "Isn't it ...bachi?"

A dangerous scientist characterized by eyes painted over in solid black circles. He specializes in pharmacology using powerful drugs. Usually polite, but short-tempered; when angry, his tone becomes like a street thug. He wields a sai, manipulates the water attribute, and acts as an ally to Sigkin and the others. A Numa.

A Numa and a highly skilled engineer. Characterized by the kanji for "sloppy" on his forehead and three ice crystals. He loves ramen so much he eats it for every meal; he looks dead inside when eating anything else. He wields giant chopsticks, manipulates water and ice attributes, and supports his allies via communication devices.

A member of the Numa race. Characterized by a face like a clown with a wide grin. He was once a hero, but now works at a restaurant, living a life mired in debt to earn money for in-game purchases. He manipulates the fire attribute and fights using a prepaid card with a zero balance.

A member of the Numa race. A crazed scientist characterized by eyes that are always wide open and a high-tension personality. She repeatedly develops and consumes drugs and possesses a brilliant mind. She manipulates the wind attribute and relentlessly pursues Marikin to use him as a test subject.

A Numa and an executive of MDCR. Characterized by a high, husky voice, a black hood, and a blue flip phone on his chest. He manipulates the power of curses and wind magic, possessing the ability to make anything he touches vanish. He is eloquent and a childhood friend of Geraldin. He calls Geraldin "Mother-ingo."

A Numa with a chubby build, characterized by black under-rim glasses and thick eyebrows. A calm, collected, and excellent boss, though he frequently makes sexually harassing remarks. He wears a yellow sleeveless sweater and black trousers, and specializes in ice magic.

A psychopathic MDCR executive, scientist, and weapons developer who wears a mask of intelligence and gentlemanly behavior. His head is covered by a fish model, and he has lost his left eye. Driven by a desire for revenge against the Grim Reaper, he has mastered science and slaughter. He manipulates water magic and a technique called "Reverse World" that inverts mechanical agility.

A friendly entity wearing a blue, sorrowful mask. Possessing a calm and kind personality, they guide lost souls to safety. They will fight their arch-nemesis, the Partygoer, to protect humans. An ally.