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|Novel|| Volume 9, Chapter 7 (First Appearance) |
Volume 10, Chapter 8 (Named)
Mimas is one of the few members mobilized to support Major Angie Sirius in either capturing or killing Shiba Tatsuya. Mimas, Iapetus, Titan and Enceladus all appeared when Angelina Kudou Shields screamed. While dressed as fake cops they tried to kill Tatsuya for knowing the real identity of Angie Sirius. Mimas ended up with a serious injury from the fight. 
Later on during the next day, it was doubted that he would be able to return to the mission. It was said that if he and Iapetus could recover enough to move, then they would be sent back to the USNA. 
- In keeping with the naming of USNA Stars members, "Mimas" is named after Mimas, Saturn's smallest Moon.