Arakawa Mikoto

Side character of episode 2
A miko born in the Arakawa family, the one with highest influence in Futagami village.
Having the duty of performing Shinto rituals, Mikoto was blessed with a special power which she would use to cleanse "infected" people.
Regarding her power, she also believes that depriving herself of eyesight would make it become stronger.

Spoiler

Becoming desperate after her mother's death, Mikoto decided to wound her eyes in hope of protecting more people in her village, which, ultimately leads to her death.