Sakura Kōno is the diligent vice president of the student council at Katagiri Senior High School, enrolled in Class 3-5 with her friend Remi Ayasaki. She possesses above-average height, forest green shoulder-length hair, green eyes, and wears round-framed glasses, typically dressed in her school uniform paired with black tights and white sneakers featuring green laces.

Kind, responsible, and reserved, Sakura meticulously manages student council affairs. Despite her competence, significant insecurity and self-doubt plague her, particularly a sense of envy towards Remi Ayasaki, whom she views as cuter and more appealing. This insecurity fuels her reluctance to admit her romantic feelings for classmate Tooru Ishikawa, though she eventually confides her crush to Remi.

Her close friendships within the student council, especially with Remi Ayasaki and Kakeru Sengoku, are central. Sakura naturally adopts an older-sister-like role towards Sengoku and exhibits a nurturing, almost maternal dynamic with Ayasaki. Personally, she enjoys reading books and baking; she is notably skilled at making cookies, which she regularly shared with Ishikawa before confessing her feelings to him.

Sakura's journey focuses on overcoming self-worth issues. After confessing to Ishikawa and facing rejection, she moves forward by concentrating on her friendships, particularly with Remi. Throughout the series, she gradually gains confidence, learns self-acceptance, and broadens her social circle, supported by her friends and deeper involvement in school life.

Her zodiac sign is Aquarius, she has an implied Buddhist affiliation, and reflects on herself with the thought: "I don't hate myself, but I don't really like myself either."