Primary

• Riki Takeuchi Former husband of Midori Nendou
• Riki Takeuchi Father of Riki Nendou

Extended

• Riki Nendou Best friend of Kusuo Saiki
• Riki Nendou Son of Midori Nendou
• Midori Nendou Mother of Riki Nendou
• Midori Nendou Former wife of Riki Takeuchi