Matasaka Kamishiro

Sachi (鯱, Sachi) is a former leader of 6th ward's ghouls. He was a strong ghoul who trained his followers and strengthen the 6th and organized it greatly, but got captured and sent to the 23rd ward's Ghoul Detention Center.

He went by the name Matasaka Kamishiro (神代 叉栄, Kamishiro Matasakae) during a certain time period, with the same family names as Rize.

Currently, he got freed with Aogiri Tree's aid and so he decided to join them, an organization that is reverse of his principles, for unknown reasons.