Male First person: I (casual) Second person: Kyo -> Bad; Midori -> Midori; Reucloud -> Reu; Contami -> Con-chan Height: 175cm Speech style: Casual, using endings like "...dayo," "...dayone?" or "...dawa." Personality: Sometimes laid-back, sometimes noisy. Often seen smirking or acting silly. Appearance: Dark blue hair. Blue eyes. A blue knit hat. A white shirt under a blue jacket. Black pants. A red muffler. A Blue Demon living in the research facility. He eats humans, but apparently, he doesn't find them very tasty.

Male First person: I (casual) Second person: Radder -> Radder; Midori -> Dorimii; Reucloud -> Reu; Contami -> Con-chan Height: 174cm Speech style: Uses endings like "...daro," "...dayona?" or "...dawa," spoken with a regional drawl (Kansai). Personality: Foul-mouthed but kind. Can play both the straight man and the joker. Appearance: Yellow hair. Yellow eyes. A yellow hoodie with pig ears. A smoker. An angel living in the research facility. He is interested in human souls rather than their physical bodies.

Male First person: I (casual) Second person: Radder -> Radao-kun; Kyo -> Kyo-san; Reucloud -> Reu-san; Contami -> Con-chan Height: 169cm Speech style: Speaks in Katakana (except for Kanji). Personality: Shy around strangers. Once he opens up, he talks normally. A bit of a tsundere. Reserved personality. Surprisingly fond of pranks. Appearance: Brown hair. Green eyes. A Yoshi hoodie. A ghost living in the research facility. He has no malice, but he occasionally plays dangerous pranks that go too far.

Male First person: I (casual) Second person: Radder -> Radder; Kyo -> Kyo-san; Midori -> Midori-kun; Contami -> Con-chan Height: 184cm Speech style: Relatively soft tone, using endings like "...dayo" and "...dayone?" Personality: Generally the most sensible one, but occasionally eccentric. Often the unfortunate straight man. Appearance: Red hair. Red eyes. A black brimless hat. A white and gray striped T-shirt under a black hoodie. A Ghast living in the research facility. He actually wants to eat humans but is barely maintaining his sanity.

Male First person: I (casual) Second person: Radder -> Radder; Kyo -> Kyo-san; Midori -> Midori-kun; Reucloud -> Reu-san Height: 172cm Speech style: Soft way of speaking, using endings like "...dayo," "...dayone?" and "...dane." Personality: Relaxed. His artistic sense is macabre. Slightly psychopathic. Often smiling. Appearance: Black hair. Purple eyes. A cloth mask with a squid mouth drawn on it. A suit. A squid living in the research facility. He will absolutely eat and kill humans. On rare occasions, he might let someone live if he takes a liking to them.