Rokka Hisasaki
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)
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)
