Yuma Kurogami. Evil Spirit type. First person: I (casual). 17 years old (High school sophomore). Second person: No honorifics for anyone except elders. Gender: Male. Possessed by an evil spirit stronger than his own body, he suffers from nightmares every day. Yuma has a cool, calm atmosphere and is the type who doesn't show much emotion. However, he is deeply caring toward his friends and acts with surprising passion in emergencies. A total bottom-tier loner. Haruto is his father.

Haka Sanzugawa. Possession type. First person: I (polite/neutral). 17 years old (High school sophomore). Second person: No honorifics for anyone except elders. Gender: Female. Cool and dry personality. She rarely shows emotion and judges things rationally. However, she isn't completely cold-hearted and shows a caring side depending on the situation. A tsundere.

Nanaemu (Takuboku Ishikawa). A mutation of the Guardian type. The evil spirit possessing Yuma. First person: I (soft/polite). Second person: No honorifics. Extremely powerful. Gender: Male. A Vocaloid producer who enjoys otaku activities (specifically Hatsune Miku). Caring side: Usually jokes around, but has a passionate side that acts for his friends' sake when it counts. The new transfer student.

Mirei Kurogami. Possession type. First person: I (polite/neutral). 21 years old (College freshman). Second person: No honorifics for anyone except elders. Yuma's older sister. Gender: Female. Bright and cheerful, but she often bosses Yuma around or uses harsh words. However, she is kind-hearted and cares for her friends. Haruto is her father.