Akemi Mikihara is a twelfth-grade student and captain of her school's tennis club. She secretly maintains a romantic relationship with the club's faculty advisor. She shares a friendship with Mio Serizawa but harbors an antagonistic relationship with Professor Takashima.

Her appearance features straight blonde hair reaching her shoulders and blue eyes. She possesses a slim build with a pale complexion and medium breast size. Her noted attire includes the school uniform with a string ribbon tie and a swimsuit.

Akemi exhibits a talkative nature often veiled by secrecy. Her personality is characterized by dishonesty, cowardice, and selfishness. The subject of confinement is noted in relation to her.