Primary

• Three Younger Brother of Four
• Three Younger Brother of V
• Three Friend of Yuma Tsukumo

Extended

• Yuma Tsukumo Younger Brother of Akari Tsukumo
• Yuma Tsukumo Friend of Ryouga Kamishiro
• Yuma Tsukumo Friend of Kite Tenjo
• Yuma Tsukumo Friend of Kotori Mizuki
• Yuma Tsukumo Friend of Astral
• Yuma Tsukumo Friend of Tetsuo Takeda
• Yuma Tsukumo Friend of Three
• Yuma Tsukumo Friend of Cathy Katherine
• Four Older Brother of Three
• Four Younger Brother of V
• Four Former enemy of Ryouga Kamishiro
• V Older Brother of Four
• V Older Brother of Three
• V Former mentor of Kite Tenjo