Aogiri Tree
Aogiri Tree is a group of militant ghouls who are fighting to take over Japan and kill all investigators.The true goals of this organization has not been reveal yet but it appears they do have a deep reason for their hate against humans.
Eto
Eto is an executive of Aogiri Tree, she is the daughter of Yoshimura, and the half-Ghoul known as the One-Eyed Owl. As Eto, she has a child-like appearance. Her entire body is wrapped in bandages, with a tattered maroon cloak with droopy ears attached to the hood. She wears a floral, pink scarf around her neck. Her right eye is a kakugan, while the other is a normal green eye.As Sen Takatsuki, she is an attractive young woman in her early 20s. She typically wears a sleepy or curious expression and dresses in modest or sloppy fashion. Her mossy green hair is usually either uncombed or bundled on top of her head in a messy bun. However, even though she's typically unkempt, she is noted to be a great beauty with many admirers and greatly resembles her late mother.As the One Eyed Owl, her initial kakuja created a mask with one hole on the right eye's position and three zigzag lines on the left, with two lines at the mouth's position slanted downwards, which greatly resembled that of her father, Yoshimura. After ten years of continued canniblisation, presumebly, her massive kakuja now forms a mask-like head with four horns and a single eye in the center with three markings on the left and right cheek and the forehead.
Ayato
Ayato Kirishima is Touka Kirishima's younger brother, and goes by the alias Black Rabbit. He grew up with his sister in the 20th ward but at some point in time, he left the district. According to Kazuichi Banjou, Ayato subsequently began to wander all the wards of Tokyo, bringing sheer wreckage and chaos upon them, until his unique powers and abilities caught Tatara’s eye. Ayato was therefore pulled into joining Aogiri Tree, where he is currently an Executive.Ayato is an arrogant, brash teenager, with a similar hot-blooded attitude resembling his sister's, while he normally displays either a scowl or menacing smirk on his face. Other than his physicalities, he shares many similarities with Touka, such as his tendency to use language that is often uncouth or inappropriate.
Tatara
Tatara is a direct subordinate of the One-Eyed King and one of Aogiri Tree's leaders.He seems to be from China, and is related to the Chinese ghoul organization Chi She Lian.Tatara has short white hair and dark eyes. He hides his mouth with a red iron mask, and is seen wearing a white cloak most times. Whenever he is seen with Eto, he is wearing a large light purple cloak. He is also very tall, towering over Eto in all of his scenes seen with her.As one of the Aogiri Tree leaders and a trusted subordinate working under the One-Eyed King, Tatara comes off as a rather loyal individual. He is portrayed as composed and stoic mostly. He often monitors the activities of the Aogiri executives, but kills in cold-blood when embarking on a mission. He is also proud of his immense stamina when fighting and the accuracy of his calculations as well.