Primary

• Kourin Tatsunagi Adoptive sister of Takuto Tatsunagi
• Kourin Tatsunagi In love with Aichi Sendou

Extended

• Aichi Sendou Older Brother of Emi Sendou
• Aichi Sendou Friend of Toshiki Kai
• Takuto Tatsunagi Adoptive brother of Kourin Tatsunagi