The logo of the organization consists of a cartoon-like design of a rat's head, with big hollow eyes and an enormous grin.
According to Dazai, their goal is to get the "The Book" however, in order to get the book, they need to exterminate the city of Yokohama, but they don’t have the strength of the Guild to incinerate the whole city. Therefore, they use killings to defeat the Armed Detective Agency and Port Mafia.
|Armed Detective Agency · Decay of Angels · Hunting Dogs · Mimic · Order of the Clock Tower · Port Mafia · Rats in the House of the Dead · Special Division for Unusual Powers · The Guild · The Seven Traitors · Transcendents|
|Sheep · Zoopark · The Seventh Agency|