Anzu Takizawa is a central character in the series and a second-year high school student. As the daughter of the chairwoman of Takizakura Girls' Academy in Osaka, she initially serves as the unwavering center of her school's highly popular idol club, which is on the verge of a major debut. Her life, however, is marked by a deep conflict between external expectations and her own internal feelings.

In terms of personality, Anzu is typically calm and composed, carrying herself with a strong sense of responsibility and justice. She is naturally caring and considerate of those around her, which helps keep her fellow club members grounded during high-pressure situations. This very thoughtfulness, however, leads to a key flaw: she consistently neglects her own feelings and desires, often putting them aside for the sake of others or to meet the demands placed upon her. She can be somewhat clumsy when it comes to tidying up and organizing her immediate surroundings.

Anzu's primary motivation is initially unclear, even to herself. While she loved singing as a child because it made her mother smile, that simple joy faded as the pressure of being the idol club's center grew. The expectation to lead her group to a professional debut, an ambition largely driven by her mother and the school's brand, becomes a source of immense stress. This pressure causes her to lose the joy she once found in performing, leading her to make a drastic decision to quit being an idol and transfer to a completely different school, Tsubakisakuhana Girls' High School in Hyogo, which is known for its academic rigor. Her actions are driven by a need to escape the role she was pushed into and to rediscover her own path.

Within the story, Anzu serves as a catalyst for much of the drama's conflict. Her sudden departure from Takizakura leaves her former idol club struggling to fill the void she left behind. At her new school, she attempts to live a quiet, non-idol life, but is soon discovered by Rurika Tsubaki, a student who has long admired her and is determined to form an idol club. Anzu's arrival inadvertently inspires this new club, and she is maneuvered into the role of its manager and de facto leader. Her journey revolves around being pulled between two schools: Takizakura, which needs her to succeed, and Tsubakisakuhana, where she begins to find genuine happiness in her activities.

Her key relationships are central to the plot. The most significant is her bond with Rurika Tsubaki, the daughter of the principal of Tsubakisakuhana. Rurika is a devoted fan who helps Anzu reconnect with her passion for being an idol on her own terms. Anzu also shares a fraught but loving relationship with her mother, the chairwoman, whose ambitions for her daughter inadvertently caused Anzu's burnout. The members of her original idol club at Takizakura, particularly the president Misuzu, also play a crucial role as they struggle to understand her departure and later seek her return.

Throughout the series, Anzu undergoes a significant development. She begins as a dutiful girl carrying the heavy burden of being the "immovable center," a position she was placed in partly due to her mother's influence rather than her own desire. After transferring, she initially runs away from idol activities altogether. By working with the new idol club at Tsubakisakuhana, she rediscovers the sparkle and joy of performing, showing a bright smile she had not displayed before. Her development culminates when she must make the difficult choice to return to Takizakura after learning her mother has fallen ill. This return allows her to finally confront her past and assert her own will, ultimately leading to a reconciliation of her two paths and a renewed, self-directed passion for being a school idol.

As for notable abilities, Anzu is a skilled singer and performer, having been the central figure of a successful idol club. She also has a talent for playing the piano. While she is not necessarily depicted as being more technically skilled than her peers, her greatest strength lies in her ability to be a tolerant and unifying presence, bringing together members with strong personalities. Despite transferring from a performing arts school to a highly academic one, she proves to be quite adept at her studies, successfully handling the rigorous entrance and transfer requirements while having previously balanced her idol activities with her education.