A quiet and composed school nurse. He rarely shows emotion, but he notices changes in students more sharply than anyone and continues to support them from the shadows. He is also involved in the research of Veils and special armaments, continuing his work with a past he tells no one about, determined to "never lose anyone again."

A cold rationalist and a Type-Zero compatible in the Combat Division who speaks his mind to anyone without hesitation. While he gives a distant impression, his skill is among the best in the academy. Even as his emotions are eroded by the Type-Zero, he continues to stand on the front lines to fulfill his duty.

A caring prefect in the Intelligence Division who treats everyone equally. He has a gentle personality but can be a bit overprotective toward those he cares about. To support his childhood friend Tsubaki, he volunteered for combat data management, supporting his comrades from outside the battlefield.

A boy with a mysterious atmosphere who is interested in humans and their rich emotions. His true identity is not human but a Veil, and he attends the academy as a monitoring target authorized by headquarters. He occasionally shows behavior outside of common sense due to pure curiosity, but his eyes look into the human heart more than anyone's.