Primary

• Manjiro Sano Grandson of Mansaku Sano
• Manjiro Sano Half-brother of Emma Sano
• Manjiro Sano Brother of Shinichiro Sano
• Manjiro Sano Best friend of Ken Ryuuguuji

Extended

• Ken Ryuuguuji In love with Emma Sano
• Ken Ryuuguuji Best friend of Manjiro Sano
• Emma Sano Daughter of Karen Kurokawa
• Emma Sano Adoptive sister of Izana Kurokawa
• Emma Sano Half-sister of Manjiro Sano
• Emma Sano In love with Ken Ryuuguuji
• Emma Sano Half-sister of Shinichiro Sano
• Shinichiro Sano Adoptive brother of Izana Kurokawa
• Shinichiro Sano Grandson of Mansaku Sano
• Shinichiro Sano Brother of Manjiro Sano
• Shinichiro Sano Half-brother of Emma Sano
• Mansaku Sano Grandfather of Manjiro Sano
• Mansaku Sano Grandfather of Shinichiro Sano