Primary

• Norihisa Takasugi Father of Akie Takasugi

Extended

• Akie Takasugi Friend of Yuzuki Mikage
• Akie Takasugi Friend of Nozomi Bitou
• Akie Takasugi Friend of Sora Egami
• Akie Takasugi Friend of Tamayo Shiina
• Akie Takasugi Former student of Hideto Tange
• Akie Takasugi Former student of Moriya-Sensei
• Akie Takasugi Former student of Azusa Aketagawa
• Akie Takasugi Daughter of Norihisa Takasugi