The group is named after Hamazura Shiage, Fremea's caretaker. Its members are Beetle 05, presumably Shiage, as well as Fremea herself.
After Fremea scribbled the mark of the Hamazura Brigade on Beetle 05's shell, it "officially" became the member of the group. The only known principle of the group according to Fremea is to help friends and never abandon them no matter what.
- ↑ Shinyaku Toaru Majutsu no Index Light Novel Volume 06 Chapter 6 Part 3
- ↑ Shinyaku Toaru Majutsu no Index Light Novel Volume 06 Chapter 6 Part 6