Primary

• Yuuichi Yagami Son of Haruka Yagami
• Yuuichi Yagami Older Brother of Hiyo Yagami
• Yuuichi Yagami Childhood friend of Marina Tachibana

Extended

• Marina Tachibana Daughter of Kanna Tachibana
• Marina Tachibana Younger Sister of Kaho Tachibana
• Marina Tachibana Childhood friend of Yuuichi Yagami
• Hiyo Yagami Daughter of Haruka Yagami
• Hiyo Yagami Younger Sister of Yuuichi Yagami
• Haruka Yagami Mother of Yuuichi Yagami
• Haruka Yagami Mother of Hiyo Yagami