Ai Miyashita is a second-year student at Nijigasaki High School and a dedicated member of the school’s idol club, where she performs in the subunit DiverDiva with Karin Asaka. She resides with her grandmother, as her parents are occupied with running the family restaurant, and it was her grandmother who primarily raised her. Ai has shared a long-standing connection with her neighbor, Misato Kawamoto, whom she has known since childhood and views as an older sister.

Sociable and approachable, Ai maintains a wide circle of friends and often engages warmly with strangers. She exhibits a caring and supportive nature toward both family and friends, and in her neighborhood, she frequently uses sibling-like terms for those around her, reflecting her inclusive and empathetic demeanor. Despite her gyaru style, which might suggest a more rebellious or careless attitude, Ai excels in her studies and athletics. She is recognized for her intelligence, strong organizational skills, and levelheadedness.

Her speech is casual and sprinkled with slang and frequent puns, though those around her rarely find them amusing. Ai possesses a childish sense of humor and laughs easily at wordplay. Despite her popularity and flawless reputation at school, she remains unpretentious and largely unaware of her esteemed image, always behaving authentically.

Ai’s hobbies include fashion, mobile apps, and games. She enjoys candy and often carries some with her, and she has a particular fondness for her grandmother’s nukazuke. Skilled in sports, she often assists various school clubs, which contributes to her broad popularity.

She works with the Famitsu App alongside Ayumu Uehara and Rina Tennoji, an experience she values for teaching her the importance of understanding diverse perspectives—a lesson she applies to her school idol activities. Enthusiastic about learning, Ai enjoys sharing insights on popular apps and trends.

Ai joined the school idol club after a friend challenged her to explore that world, which she found thrilling. Her goal is to become the top school idol and share unseen aspects of this world with others. She is motivated by a desire to make her grandmother proud through her dedication.

In appearance, Ai has light blonde hair typically tied in a ponytail, orange eyes, and an athletic, slim figure. Her image color is ultra orange.

Her character development shows a shift from someone who readily takes on new challenges to a committed school idol who values teamwork and self-expression. Interactions with club members, especially Rina and Karin, highlight her supportive and nurturing personality. Ai maintains a balance between her cheerful, pun-loving exterior and her serious, responsible nature.