Hayato Aozora, a second-year Seigetsu Academy student born September 15th under Virgo, stands 182 cm tall, weighs 60 kg, and possesses red hair, brown eyes, and blood type A. As Student Council Vice President, he presents a formal, polite, and rational front, diligently managing fellow council members Kazuki Shiranui and Tsubasa Amaha. Beneath this composed exterior lies a darker side triggered by anger, often manifested through the jarring tactic of scraping his nails across a blackboard.

Born into a family of renowned pianists, Hayato exists in the shadow of his older siblings, the acknowledged geniuses Hayate and Kanon. This dynamic resulted in severe neglect; his family withheld even the basic acknowledgment of his name. Consequently, he developed a deep-seated inferiority complex and a desperate craving for familial validation. Perceived as the musically untalented "bastard child" compared to Hayate and Kanon, he abandoned his home for residence at Seigetsu Academy. Yet, his insecurities about his capabilities and self-worth endure.

These anxieties intensify as he prepares to assume the role of Student Council President after Kazuki's graduation. The pressure to meet expectations fuels his profound fear of inadequacy, a legacy of his familial rejection. His piano heritage remains a persistent source of emotional turmoil, feeding his cynical worldview. He openly expresses disdain for Christmas, rejecting Santa Claus, gift-giving, and any associated sentimentality. His path involves confronting these internal conflicts while striving to forge his own identity and prove his worth beyond familial comparisons.