Primary

• Shunsuke Segawa Younger Brother of Tsukino
• Shunsuke Segawa Younger Brother of Asaka
• Shunsuke Segawa Younger Brother of Yuki

Extended

• Asaka Younger Sister of Tsukino
• Asaka Older sister of Shunsuke Segawa
• Asaka Older sister of Yuki
• Tsukino Older sister of Asaka
• Tsukino Older sister of Shunsuke Segawa
• Tsukino Older sister of Yuki
• Yuki Younger Sister of Asaka
• Yuki Younger Sister of Tsukino
• Yuki Younger Sister of Shunsuke Segawa