Primary

• Yu Kirino In love with Hakuto Kunai
• Yu Kirino Subordinate of Hakuto Kunai
• Yu Kirino Creation of Akira Oono
• Yu Kirino Ally of Isami Tahara

Extended

• Isami Tahara Subordinate of Hakuto Kunai
• Isami Tahara Ally of Yu Kirino
• Isami Tahara Creation of Akira Oono
• Akira Oono Creator of Zero Kirisame
• Akira Oono Creator of Hakuto Kunai
• Akira Oono Creator of Yu Kirino
• Akira Oono Creator of Isami Tahara
• Hakuto Kunai cursed and sometimes controlled by Satan Ring
• Hakuto Kunai Ally of Ebifry Butterfly
• Hakuto Kunai summoned by Throne
• Hakuto Kunai Master of Isami Tahara
• Hakuto Kunai Master of Yu Kirino
• Hakuto Kunai Guardian of Aku
• Hakuto Kunai Ally of Luna Elegant
• Hakuto Kunai Ally of Yukikaze
• Hakuto Kunai a frequent customer of Bingo
• Hakuto Kunai Ally of Mikan