凪 九厘

A suspicious and unknown woman who seems to be staring at 
Tsukumo and Natsuki during one of their outings together ...

She will come to meet Tsukumo after Natsuki's death. She knows strangely well the siblings and seems to know everything. She disguises a mystical aura around her and seems unreal.

She asks Tsukumo if he wants to save his sister and she tells him that there is a way to save her and that she can help him get there.

In reality, she's Natsuki's classmate from when they were in high school. Her height is 180 cm when including the heels she usually wears.

The only man she was able to love was the "friend" of Natsuki and she still loves him./