Primary

• Erina Yuuki Younger Sister of Keita Yuuki
• Erina Yuuki Older sister of Yuzu Yuuki
• Erina Yuuki Older sister of Tomoka Yuuki
• Erina Yuuki Half-sister of Saori Yuuki

Extended

• Keita Yuuki Older Brother of Erina Yuuki
• Keita Yuuki Older Brother of Tomoka Yuuki
• Keita Yuuki Older Brother of Yuzu Yuuki
• Keita Yuuki Half-brother of Saori Yuuki
• Tomoka Yuuki Older sister of Yuzu Yuuki
• Tomoka Yuuki Younger Sister of Keita Yuuki
• Tomoka Yuuki Younger Sister of Erina Yuuki
• Tomoka Yuuki Half-sister of Saori Yuuki
• Yuzu Yuuki Younger Sister of Keita Yuuki
• Yuzu Yuuki Younger Sister of Erina Yuuki
• Yuzu Yuuki Younger Sister of Tomoka Yuuki
• Yuzu Yuuki Half-sister of Saori Yuuki
• Saori Yuuki Half-Sister of Erina Yuuki
• Saori Yuuki Half-Sister of Tomoka Yuuki
• Saori Yuuki Half-Sister of Yuzu Yuuki
• Saori Yuuki Half-sister of Keita Yuuki