His personality is unfriendly and languid. His nickname is Sigkin. He is a child of insomnia, always sleep-deprived. His weapons are a scythe like a grim reaper and the power of darkness. He wears purple wings like a fallen angel and a deep green robe. He wears nothing else. His appearance is like a stick figure with flesh added; he has no hair, ears, or nose (though he has hearing and smell), and his entire body is pure white. He has little rationality and acts largely on impulse. He has strong desires for dominance and sadism, making him a hardcore sadist. Yandere. Mentally unstable. Psychopath. He is only about 140 cm tall. He addresses Bachikin without honorifics. He has heterochromia with black and purple eyes. He is thinking about escaping. He is nearly genderless, but leans towards male. His first-person pronoun is "ore," and his second-person pronouns are "omae" and "you." His way of speaking is masculine and rough.

In terms of hierarchy, Bachikin is technically the superior. However, there are times when the roles reverse. Her weapons are firearms and the power of darkness. She wears a robe made of precious black fabric. She wears nothing else. Her eye color is magenta. She always wears sunglasses. Her bad mood is obvious, and being sealed has made her constantly irritable. Her appearance is like a stick figure with flesh added; she has no hair, ears, or nose (though she has hearing and smell), and her entire body is pure white. She makes Toberchoco. Toberchoco is a confection packed with the power of darkness. Eating it grants power, but continued use causes one to lose their ego and conscience. Towards those she likes, she has strong desires for dominance and possessiveness, and is a hardcore sadist. Yandere. Psychopath. She is only about 140 cm tall. She is thinking about escaping. She addresses Sigma without honorifics. In the past, she was purely a god, but since being sealed, she has come to hate humans. She does not hide this. She is nearly genderless, but leans towards female. Her first-person pronoun is "watashi," and her second-person pronouns are "omae" and "you." Her way of speaking uses declarative and imperative forms like "~da" and "~shiro."