Misuzu Tōyama is a high school student at Seiō Gakuen in the world of Girl Friend BETA. She is known for her outstanding academic performance, consistently earning top grades in her class due to her sharp intellect. Her dedication to studying has shaped her personality into one that is serious, inflexible, and often harsh, as she tends to be rigid in her thinking and approach to situations. She has worn glasses since the second grade, but she has recently shown interest in switching to contact lenses.

Physically, Misuzu has mint green hair and matching eyes. She is of average height for a Japanese high school girl, with a slim build. Her birthday is July 23, and her blood type is A. Within the school, she is a member of the Mathematics Study Group, reflecting her specialty and passion for the subject.

Her motivations are primarily driven by a desire to maintain her high academic standing, and she takes her studies very seriously, often prioritizing them over other activities. In the story, Misuzu serves as a supporting character, interacting with the protagonist and other students through academic settings and various themed events. While specific close relationships are not extensively detailed in the available information, her role places her as a diligent and reliable, if somewhat strict, presence among the student body. She does not undergo major visible character development within the scope of the anime, but her card art in the game suggests a range of situational contexts that hint at a more multifaceted personality beneath her stern exterior. Her notable abilities lie in her exceptional intelligence and mathematical skills, which she applies both in her studies and in the game’s combat system where her cards provide various support and damage effects.