[GundamAce]

Last Part

Spoiler for SIRIUS:

Rokumei City's Fire Fighting Department Special Advanced Rescue Party (Sirius)

The rescue team that Watase's group belongs to. In order to enlist in this division, you must pass a severe examination and show yourself to be an expert in saving human lives.

One team has six members (one of them dealing with the team's organization), and compose two separate teams. (?)
Also, at the head of these teams are a commanding officer and vice-commander.

"Sirius" is a name for Alpha Canis Majoris. It is the brightest star seen from the Earth, save for the sun.

In Greek, the name means "scorcher" or "burning", and is derived from "seirios".
In China, it is identified as a heavenly wolf.
Here, it refers to a rescue dog. The rescue team members are like a star of hope to the others, waiting for rescue.