|Anime Debut||Episode 21|
|Voice Actor||Hirohashi Ryou|
|Book of Friends|
|List of Characters|
A mermaid youkai who hates humans because they hunted her species in order to eat their flesh and obtain immortality. In the past she felt betrayed by Chizu Sakanaka, a little girl she had made friends with, because of a misunderstanding.
The child is now an old lady, and owner of the inn where Natsume, Kitamoto and Nishimura stay for a night. The misunderstanding is cleared with the help of Natsume. Her name was included in the Yuujinchou.
Sasafune is a mermaid, with pale skin and silky, blonde and long hair. She is wearing a white inner-kimino with a blue-ish coat on the outside. When she is a mermaid, she has a light-blue scaled tail. She has little horns on her head. Her eyes are blue.