Naki is a ghoul who was imprisoned in Cochlea until Aogiri Tree's invasion on the prison. He was liberated by Aogiri Tree due to being a direct underling and supposedly the right hand man of Yamori. He was almost always accompanied by the Twins Gagi and Guge.

He eventually climbs the ranks within Aogiri, and has become an Executive in his own right. The number of Ghouls following him has grown considerably, forming a gang known as the White Suits for their distinctive dressing style. Naki is left handed.