Types of groups found in tokyo ghoul

In tokyo ghoul we find very different groups, some only good and some bad.

ANTEIKU:

Is a pacifist ghoul organization, using as an alibi a coffee shop. In the coffe shop go humans and ghouls. The only thing they sell is coffee, because it’s the only food the ghouls can eat.The workers of alli are ghouls and in exchange for their work in the cafeteria they are given human meat from suicide victims.

Anteiku is actually the whole building, being that on the ground floor there is a staircase that leads to the second floor, where the cafeteria is, and on the following levels find the rooms of Touka, Hinami, the manager and his office. On another floor is the cellar or the "freezer" where they keep the corpses and the meat they give to the ghouls who need it, and it is in the first sub-level. 

CCG:

It’s an organzation that goes against the Ghouls. It’s a federal agency that serves as a criminal investigation and combat corps in ghouls-related cases. The headquarters of the GCC was its Main Office, located in District 1 of Tokyo. Ghouls often call GCC ghouls researchers pigeon. The last President and Head of the GCC was Kichimura Washuu.

QUINX SQUADRON: 

Is a ghoul research team composed of five Quinx, who are Ghoul Investigators. The Quinx members are known as "humans" with a Quinque attached to their body. The groups are made up of Squadron S2 and the Mado Squadron. The main objective of the squadron is the eradication of the antagonistic Ghouls of Tokyo, which threaten the existence of humanity, like the One-Eye Owl and One-Eye King. The tasks assigned to the Quinx Squad are often supervised by Haise Sasaki because he is the mentor of the group.

AOGIRI TREE:

It’s a powerful terrorist ghoul organization who usurped power in District 11, targeting District Ghoul Investigators. In recent years, the fight against the organization’s growing strength and influence has become one of the GCC’s highest priorities.The leaders of this group are believed to be from the 24th district.

CLOWNS:

Is a small group of hedonistic ghouls with no known goal or purpose. Its members mostly wear clown themed masks, and declare their intention to "Have the last word" . The GCC has planned a famous investigation of them in District 3, as mentioned by Hideyoshi Nagachika.It is not known how many members this group is made up of.

GHOULS:

Ghouls are a carnivorous and cannibal species that can only feed on Humans and other Ghouls. They are very similar to humans physically; they usually have the same physical appearance and intelligence as a Human with the exception of their diet, mindset and internal biology. Ghouls and Humans may even be able to have offspring (Ghouls of an Eye), and the organs of a Ghoul can be successfully transplanted into a Human (Quinx Surgery and Kakuhou Transplant).