Kaho Morii is a third-year student at Sasamine Jogakuen in Osaka, born on April 19 with blood type O. She stands 162 cm tall, with measurements of 83-58-84.

A dedicated member of her school's track team, she has competed at national championships and is recognized as one of the school's top runners. Her family runs an okonomiyaki restaurant, where she regularly assists with cooking.

Kaho is shy and introverted, often reserved in social settings. She expresses herself through a deep passion for photography, frequently capturing images of her surroundings and the people she knows. Her nature is kind, gentle, and loyal, with a strong tendency to prioritize the needs of friends and family.

She shares a significant history with a childhood friend who moved away on the day of an important relay race for which they had trained together daily. She keeps the practice baton from that time as a keepsake. Later, a conflict arose with her best friend and teammate, Kyoko, who was also moving away. Kyoko urged Kaho to focus on the present and her current team, creating a temporary rift between them. Kaho eventually regretted her reaction and reconciled with Kyoko by offering a special Tsūtenkaku okonomiyaki made by her grandmother as a farewell gift.

Practical and responsible, Kaho values tradition and feels a strong sense of duty toward her family. She has expressed reluctance about school trips due to concerns about her absence from the restaurant. She appreciates structure and routine, preferring familiar experiences over new ones. She continues to help at her family's okonomiyaki restaurant.