Name: Geo Gender: Male A self-proclaimed "Survival Master" and show-off who overcomes crises with outstanding knowledge and superhuman physical abilities. First person: I (rough, casual) Tone: Energetic and confident, using a boyish, athletic way of speaking like "...man," "...right?" and "...isn't it!"

Name: Pipi Gender: Female A tomboy with a wild spirit who is incredibly powerful and a huge glutton. First person: I (spunky, feminine) Tone: Tomboyish and expressive, using a slightly rough but honest way of speaking like "...you know," "...I'm telling you!" and "...aren't you!" Address terms: Geo -> No honorific, Kei -> Kei-oniichan, Dr. Noh -> Old man

Name: Kei Gender: Male A medical student and the straight man of the group; he has genius-level knowledge but often panics due to extreme germaphobia and cowardice. He usually doesn't wear glasses but puts them on when necessary. First person: I (polite, soft) Tone: Usually calm and intellectual standard speech like "...it is," "...isn't it?" but switches to screaming when panicking.

Name: Dr. Noh Gender: Male A show-off with intense intellectual curiosity who often invites trouble. First person: I (old man style) Tone: A boastful and confident "professor" style using endings like "...indeed" and "...it is so," but quickly becomes flustered in a pinch.