**Relatives**: Biki (cousin) Sui is the youngest daughter in her family. Six months ago, she contracted a disease, making her eyes sensitive to light. Unable to find the cause nor a cure, her family sent her to relatives they knew and kept her in a storage shed in complete darkness. Biki looks plays with her and looks after her.

Spoiler

Visiting Sui, Ginko realizes she went into the river of light and had permanently lost her eyeballs. He takes her outside and tells her to open her eyes while keeping her second eyelids closed. As she does, the Mushi inside of her is lured out from the moonlight. As the liquid poured out, he sees the Mushi coming out and tells her to close her eyes, which makes the liquid return to her eyes, but Ginko catches the centipede-like Mushi. He explains her eyeballs are gone and take out his fake glass eye and injects it with the liquid Mushi. He then places it into her left eye socket, causing a pillar of light, but allowing her to see with that eye. She lives a normal life afterward.

(Source: Mushishi Wiki, edited)