Primary

• Sei Iori son of Takeshi Iori
• Sei Iori son of Rinko Iori
• Sei Iori Boyfriend of China Kousaka

Extended

• China Kousaka Girlfriend of Sei Iori
• China Kousaka Owner of KUMA-03 Beargguy III
• China Kousaka Older Sister of Yuuma Kousaka
• Takeshi Iori Father of Sei Iori
• Takeshi Iori Husband of Rinko Iori
• Rinko Iori Mother of Sei Iori
• Rinko Iori Wife of Takeshi Iori