Rakugosha

Daigotsu Akechi was a courtier of the Shadowlands who was eventually known as Rakugosha. He became Sensei of the Voice of the Lost Academy

Lost
Akechi was born in the Shadowlands to a Daigotsu vassal family. As a youth, he showed a certain native cunning and talent for public speaking, becoming a courtier of Daigotsu's court. He was disgraced when the dealings of a Goju ambassador he had patroned were rebuked. Akechi was exiled instead to commit seppuku.

Sensei
Akechi shed his old name and began calling himself Rakugosha. One of his sensei in the Voice of the Lost Academy recalled him and appointed Rakugosha as sensei.