Yuu's sister. She is three years younger than him. Rokka was separated from her brother at age seven, and has lived with her mother since then. (Source: Chapter 2, Page 2 of the Gunners manga)
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Yuu's sister. She is three years younger than him. Rokka was separated from her brother at age seven, and has lived with her mother since then. (Source: Chapter 2, Page 2 of the Gunners manga)
