Red Circus

The Red Circus (レッドサーカス) is an extremist group of terrorists that hijacked two Eden Academy buses on the way to the Berlint Museum for a trip.

Members
Billy Squire: Billy is the former leader of the Red Circus and commands a faction in Berlint. Together with his group, they hijack two Eden school buses while on a field trip and take the students inside hostage. His demands are to free his imprisoned comrades and gain safe passage to Nortica. After Anya Forger reminds him of the memory of his daughter, Billy has a change of heart and surrenders. He and his group are currently in police custody.

Biddy Squire: Biddy was a member of the group when it was still a student movement and strongly protected the idea of ​​having a voice and doing the right thing. She was murdered by the SSS during a protest gone violent.

Vadim: He is a member of the group. Together with Billy, the group hijacks two Eden school buses while on a field trip and takes the students inside hostage, with Vadim driving one of the buses. After Billy has a change of heart and surrenders, Vadim attempts to drive away, even taking Anya as a hostage at gunpoint. Vadim is stopped by Martha Marriott, and he and his group are taken into police custody.

Red Circus Woman: She is a member of the group. She is currently in police custody alongside Billy and Vadim after the failed hijacking attempt.

Bruce: He was a member of the group. Together with Billy, the group hijacked two Eden school buses while on a field trip and took the students inside hostage, with Bruce in charge of the second bus. He hid the bus at a warehouse to wait for their plan to move forward. Their location was discovered by Yuri Briar, who called in the SSS to execute him and his group and saved the hostages.

Five Unknown Red Circus Members: Members in Bruce's group. They were protecting the missing bus that was successfully taken out of the Eden school bus caravan until the SSS intercepted and executed them.

Red Circus Survivor: A former member of the group and the lone survivor of his faction when the "Thorn Princess" killed them all at their hideout. In an attempt to avenge his comrades by killing the assassin at the restaurant he works at, Anya threatens him not to approach Yor ever again, and he decides to live a normal life with his girlfriend.

History
According to Billy, the Red Circus started as a student movement advocating for peace and equality and spoke out to protect the weakest members of society. They were a respectable movement that fought for their cause with respectable means, but the state turned violent against them and made orders to eliminate the group.

Over time, they became an organization that sought revenge and justice against the government that wronged them. This also resulted in the group becoming violent, as a news report described them as "a radical terrorist group... responsible for multiple acts of indiscriminate domestic terrorism." They eventually caught the attention of the assassin group Garden, who dispatched the Thorn Princess to their hideout to kill everyone there.

Trivia

 * The Red Circus is a leftist, possibly communist, group. Besides the "Red" in their name being associated with socialism and communism, in non-English versions of Chapter 69, the SSS Boss describes them as a far-left group. In later chapters of the Red Circus arc, Billy Squire mentions that their ideology is all about equality. He also has disdain for the upper class, including Eden Academy students and their parents, deeming them selfish people.