Utsusemi Agency

Utsusemi Agency (虚蝉機関 Utsusemi Kikan) is a group led by Hanezu Himejima, and is the antagonist of the first arc.

History
The Utsusemi Agency is formed by the outcast members of the Five Great Families and Four Watcher Families. In order to overcome that and seek revenge on the Five Great Families and Four Watcher Families, they decide to use a different source of power that differs from their clans, the ' ( lit. "Four Evils") and ' ( lit. "Lesser Evils") by formulating the Four Fiends and Friends Project with the Independent-Avatar Ancient Gears as their base. To that end, the group targeted the Ryoukou Academy's second year students with the required Ancient Gears but all of them were absent during that trip forcing the group to change their original plans and instead used the kidnapped students by implanting Utsusemi into the students and use them to hunt the actual possessors of the Four Fiends.

Four Fiends and Friends Project
The Four Fiends and Friends Project (四凶と小凶計画, Shikyō to Kokyō Keikaku) is the main objective of the Utsusemi Agency. The main goal of this project is to find four specific Independent Avatar Ancient Gear users with the Four Fiends, four legendary ancient monsters sealed in it, along with a hundred other users with their 'Friends' sealed in them.

The main Four Fiends and their known possessors are:

The known Friends and their known possessors are:

Members

 * Hanezu Himejima (Principal Section Head; deceased)
 * Deimos Hoffman (Watcher Section Head; captured)
 * Kazuhisa Doumon (Captured)
 * Weasel (Deceased)
 * Soichirou Hasegawa (Formerly)
 * Sae Tomoe (Formerly)
 * Kouta Sasaki (Formerly)