ナキ

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

He eventually climbed the ranks within Aogiri and had become an executive in his own right. The number of ghouls following him had grown considerably, forming a gang known as the White Suits for their distinctive dressing style.

Tokyo Ghoul Wikia