Hiroya Aikawa is a popular idol and a central figure in the life of the protagonist, Miho Shinohara. He works within the entertainment industry as a established singer, and his career serves as an aspirational model for younger talents. Within the story, Hiroya holds dual significance for Miho, acting as both her primary love interest and her mentor in the world of show business. As a mentor, he provides guidance and support, helping the newly transformed Fancy Lala navigate the complexities of her budding career. He is a charming individual, with one source noting his pleasant demeanor that draws others to him. Physically, he is characterized by his blue eyes and blue hair that falls to his shoulders.

Hiroya's role in the narrative is intrinsically linked to Miho's journey. Her deep admiration for him is a driving force, motivating her actions and fueling her determination to succeed as an idol. Over the course of the series, their relationship evolves from a simple fan-idol dynamic into a more complex professional rivalry, as Hiroya himself declares Lala to be his rival. In a significant moment, he presents her with a large bouquet of flowers, expressing his happiness at knowing her before she became a huge star, and showing his support for her growth. This interaction highlights his supportive nature and the mutual respect that develops between them. He is also aware of her talent and potential, and he plays a key part in her emotional world as the object of her affection, with Miho visibly blushing at his kind words. Ultimately, Hiroya Aikawa is presented as a supportive, popular figure whose presence is a catalyst for the main character's aspirations and romantic feelings.