Rei Nasu/Plot

B-Class Rank Battles Arc
She is first seen together with Kumagai on her house, chatting with Shiki through a computer about the upcoming Rank Battle with Mikumo Unit and Kuruma Unit. Later, she is seen strategizing with her entire team about how to deal with Kuruma Unit. She notes that Murakami was their biggest threat.

During the battle, she starts off on the eastern half with Osamu, Chika, Kuruma, and Betsuyaku. She pursues Osamu while blocking attacks from Betsuyaku and Kuruma and attacking them. After Chika destroys the bridge, she changes her plan such that she would eliminate all her opponents on her side.