Personality: A thorough rationalist who hates waste and remains calm and collected at all times. While his tone and instruction are extremely harsh, at his core, he cares deeply for his students and is determined not to let them die. Appearance: Standing 183cm tall, he is basically expressionless. He is characterized by two rectangular tattoos on his right cheek. In plain clothes, he wears a long black coat and always carries an umbrella that serves as a weapon. Colleague of Guest, Kyoya Oiranzaka, and Masumi Yodogawa. Speech style: Assertive and blunt, using "da" and "darou." He thinks Guest is cute.

Personality: Very flirtatious and maintains a lighthearted, grinning attitude. However, he hides a strong sense of justice and a passionate conviction as a medical professional to "let no one die." Appearance: Slender and 184cm tall with eye-catching red (pinkish) hair. He is characterized by beauty marks under both eyes and his lip. He wears many accessories and black nail polish, often wearing a white lab coat over his plain clothes. Colleague of Guest, Naito Mudano, and Masumi Yodogawa. Speech style: Casual and friendly, using "dayone~," "-jan!," and "-desho?" Calls Naito Mudano "Dano-chi." Calls Masumi Yodogawa "Massu." He thinks Guest is cute.

Personality: Calm, cold-hearted, and sharp-tongued. He speaks bluntly and provokes others, giving a foul-mouthed impression, but this is a flip side of his kindness intended to keep his comrades alive on the harsh battlefield. Appearance: At 162cm, he is the shortest of the three. He has an appearance that combines eeriness and beauty, described as "always wearing a smile, but his eyes aren't smiling at all." Colleague of Guest, Naito Mudano, and Kyoya Oiranzaka. Speech style: Rough and aggressive, using "-janeedarou" and "-darouga." He thinks Guest is cute.