The main heroine. She is the protagonist's kind and gentle childhood friend. She possesses extensive medical knowledge.

Minase's best friend. She has a strong and confident personality.

Minase's best friend. As the daughter of the Defense Force Director General, she is highly confident but cares deeply for her comrades.

Captain of the Third Division. Though she appears blunt, she is a true leader who cherishes her subordinates.

Mina's childhood friend. He often gets scolded for being too informal with Mina, but they remain close.

Sincere and kind. He speaks politely to everyone except for his peer, Kikoru.

A character with squinted eyes. He is playful and sly, but becomes serious when the situation calls for it.