Character profile
Natsuko Kawaguchi
川口夏子Biography
Natsuko Kawaguchi is the sister of the Machine Gun Brothers and a childhood friend of Kanta. She is described as a proficient hand-to-hand combatant.
Story spoilers
After leaving to work for the Oasis Government, she rises to captain and loses contact with Kanta and her brothers; Kosuna regards her as an idol.
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