結城 芹

Seri is a student at the prestigious "St. Lawrence Girls' Academy" for refined young ladies, which is located right next to Seidou Gakuen, the school that the protagonist attends.

Seri is a gentle and mature young lady who instills a warm and loving atmosphere around her. For that reason she is quite popular at her school especially with junior students who tend to call her their onee-sama (older sister). Seri has two main weaknesses, one of which is her insecurity about having small breasts. Her second weak point is being unfamiliar with men, since she has only been attending schools for girls all her life. Despite her insecurity Seri deeply longs for true love and enjoys writing romance novels in her spare time.