Primary

• Michel Kasugano Father of Urara Kasugano
• Michel Kasugano Son-in-law of Heizou Kasugano

Extended

• Urara Kasugano Daughter of Michel Kasugano
• Urara Kasugano Granddaughter of Heizou Kasugano
• Urara Kasugano Client of Kouta Washio
• Urara Kasugano Friend of Karen Minazuki
• Urara Kasugano Friend of Rin Natsuki
• Urara Kasugano Friend of Kurumi Mimino
• Heizou Kasugano Grandfather of Urara Kasugano
• Heizou Kasugano Father-in-law of Michel Kasugano