Vigilantes

The Vigilantes are a group of anti-technologists and traditionalists. They wear T-shirts featuring moe characters.

They believe Maori Niizono to be a traitor to humanity since she has incorporated the Novum Organum into herself. However, they've had a long cease-fire with her because they believed her to be invincible. Once Mika Furutsuki has been revived as the 2nd Generation Idol though, they hold her hostage to distract Maori and then ultimately kill her and eat her organs. Mika's sister Miya Furutsuki was a member of the Vigilantes, but is killed by Maori as she is being killed.

After Maori's death, Mika swears to get her revenge on them and ultimately wipes them out as the 4th Generation Idol.