|Yūko Kumagai||Akane Hiura|
Following the Second Large-Scale Invasion, Hiura's parents were going to move out of Mikado City because of the danger. Due to this, the girls vowed to get to upper B-Rank before she left. In Round 2, they had gone up against Suzunari First, Urushima Unit, and Kakizaki Unit, tying with the latter two units at 2 points.
Nasu Unit is given the right to choose the stage for the Round 3 Rank Battle. After analyzing Tamakoma Second and Suzunari First, they choose the city riverside in stormy weather. As their plan hinges on the reuniting the team, when they are all in distant initial locations, they prioritize getting together at the bridge. However, Chika destroys the bridge, leaving Nasu on one side, and Kumagai and Hiura on the other. Hiura and Kumagai are taken out by Yūma and Murakami respectively, while Nasu defeats everyone on her side, save Chika, earning her team 3 points. However, she is forced to Bail Out due to excessive trion leakage, giving Tamakoma Second the victory. Nasu Unit managed to place in second.
During Galopoula's Invasion, Hiura assembles with the rest of the sniping force, shooting the waves of Idras. Nasu and Kumagai confront Wen Sō, Gatlin, and Ratarikov. Gatlin and Ratarikov escape, making it a battle between Wen Sō and the girls. Wen Sō uses Servitora to confuse the girls, managing to cut off Nasu's arm. However, with the arrival of Kikuchihara, Nasu was able to pinpoint the real Wen Sō and defeat her.