Primary

• Haruka Sawamura (adult) Adoptive Daughter of Kazuma Kiryu
• Haruka Sawamura (adult) Mother of Haruto Sawamura
• Haruka Sawamura (adult) Biological Daughter of Kyouhei Jinguu
• Haruka Sawamura (adult) Daughter of Yumi Sawamura

Extended

• Kazuma Kiryu In love with Yumi Sawamura
• Kazuma Kiryu Former Friend of Kyouhei Jinguu
• Kazuma Kiryu Enemy of Kyouhei Jinguu
• Kazuma Kiryu Grandfather of Haruto Sawamura
• Kazuma Kiryu Ally of Ichiban Kasuga
• Kazuma Kiryu Ally of Goro Majima
• Kyouhei Jinguu Former Friend of Kazuma Kiryu
• Kyouhei Jinguu Father of Haruka Sawamura
• Kyouhei Jinguu Enemy of Kazuma Kiryu
• Haruto Sawamura Son of Haruka Sawamura (adult)
• Haruto Sawamura Grandson of Kazuma Kiryu
• Haruto Sawamura Grandson of Kyouhei Jinguu
• Haruto Sawamura Grandson of Yumi Sawamura