Mika is a young woman with dark eyes and short black hair, with side bangs that partially cover her right eye. She wears a black military uniform, along with a scarf, gloves, and boots of the same color. She carries a rifle as her weapon. Mika is a kind-hearted person but she often struggles with fear and lacks self-confidence in dangerous situations. She rely heavily on her companions for emotional support and reassurance, sometimes masking her nervousness with humor as she tries to crack a joke about haunting her friend, Hideo, to lighten up the mood when nervous, indicating her friendliness.

Hideo is portrayed as a pale-skinned man with slightly messy black hair. He often keeps a relaxed expression. He wears a black military uniform that consists of black scarf, gloves, and boots. He also wields a gun with him at all times, just like Mika and Shion. Hideo is easygoing, adaptive and caring, showing a relaxed attitude against monsters but softening sometimes and helping them to survive.