The 177th Branch Office is a tall building five floor building where the main office can be found on the fifth floor of the building. It looks small at first, containing many boxes full of documents and papers making it look crowded however, it can fit many people. It can hold several people at a time and contains tables with laptops and computers along with a kitchen, couches, a wating room for guests to stay at during visits, and a conference room for branch members to meet at.
- Mii Konori - Chief
- Aomi Yanagisako - Member (rarely seen working)
- Kuroko Shirai - Field Agent
- Kazari Uiharu - Desk Analyist
- Mikoto Misaka - Freguent Visitor
- Ruiko Saten - Frequent Visitor