Primary

• Saki Tenma Younger Sister of Tsukasa Tenma
• Saki Tenma Childhood friend of Honami Mochizuki
• Saki Tenma Childhood friend of Ichika Hoshino
• Saki Tenma Childhood friend of Shiho Hinomori

Extended

• Tsukasa Tenma Older Brother of Saki Tenma
• Tsukasa Tenma Friend of Rui Kamishiro
• Tsukasa Tenma Friend of Emu Ootori
• Tsukasa Tenma Friend of Nene Kusanagi
• Tsukasa Tenma Childhood friend of Touya Aoyagi
• Ichika Hoshino Childhood friend of Honami Mochizuki
• Ichika Hoshino Childhood friend of Saki Tenma
• Ichika Hoshino Childhood friend of Shiho Hinomori
• Honami Mochizuki Childhood friend of Ichika Hoshino
• Honami Mochizuki Childhood friend of Saki Tenma
• Honami Mochizuki Childhood friend of Shiho Hinomori
• Shiho Hinomori Younger Sister of Shizuku Hinomori
• Shiho Hinomori Childhood friend of Saki Tenma
• Shiho Hinomori Childhood friend of Ichika Hoshino
• Shiho Hinomori Childhood friend of Honami Mochizuki