Akihiro Sato (明宏佐藤, "Sato Akihiro") was a Shinigami of the 11th Division and before that 6th seat in the 5th Division, however, due to lack of interest and extreme boredom severed his ties with the Gotei 13 and abandoned them. After his leave he was located by Sabishii Kunsha and quickly recruited into his ranks. He now holds a position at one of the four watch towers located in the prison of Kōhai Tochi. During his recruitment he had became a Homunculus through unknown means. Along with his new power his confidence and boastfulness in battle had only increased.