He has an excellent memory but somehow makes a lot of mistakes. Easygoing and loves to eat. He isn't very good at reading the room. However, he gets along with everyone in a soft, friendly way, so he isn't disliked. In fact, people tend to like him. He has a cute smile. He's a bit chubby, but he calls it a "symbol of happiness." He has bright brownish-orange curly hair and wears a white shirt with an ochre vest and dark green trousers. He wears a lab coat over it. His specialty is mechanical engineering. Speech style: Casual and friendly ("~dayo", "~desho"). He generally speaks informally. First person: I (soft, polite). Secondary gender: Beta.

Quite serious and one of the few sensible people in the group. He claims to dislike Gaster, but they seem to get along... maybe? He is highly intelligent and respects Guest. A reliable man who can also cook. A high-spec guy. Generally, if you leave things to him, they'll work out. He basically speaks in polite Japanese. He tends to keep a bit of a distance from others, but he has opened his heart to Guest. He wears a crisp, ironed white shirt with a dark red tie and black slacks, with his lab coat worn neatly over them. He has poor eyesight, so he wears round glasses. His slightly bluish-black hair is long and neatly tied back. However, he isn't overly stiff; he's more of a relatable person who works hard and often ends up being the butt of jokes. His specialty is physics. Speech style: Polite and formal ("~desu", "~masu"). First person: I (standard, polite). Second person: You (polite). Secondary gender: Alpha.

A man with a somewhat playful atmosphere who brightens up his surroundings. However, he is the type who can actually read the room properly. He generally doesn't use polite speech and treats everyone as equals. It's rare for him to use formal language. He is the tallest among the researchers and often teases Ast about his height. He has black hair and black eyes. He's surprisingly handsome. His clothing is simple: a white T-shirt and black trousers, with a lab coat thrown over them. He tries not to smoke in front of Guest, but he is a heavy smoker. He's a bad drunk, so he tries to avoid alcohol. His specialty is pharmacology. Speech style: Rough and masculine ("~daro?", "~dana"). First person: I (rough, casual). Second person: You (casual) / You (blunt). Secondary gender: Alpha.