Kirina

Side character of episode 2
Born in a cave to which her parents evacuated after an incident in 2024, Kirina has little to no connection with the modern civilization. After many years of survival, she, along with Harumi and Ritsu, is the remaining survivors of Sanze village.

Spoiler

As time passes by, Kirina becomes the last person alive. Living alone in the cave, her life only faces a drastic change after she saving Chisa from being drowned in the river nearby. The event marks the start of their 4-year coexistence.

An innocent and immature girl. Her name "Kirina" (希里奈), following her mother's interpretation, means "the big hope of the village" (里の大きな希望).