Kaya Miyoshi, who later becomes Kaya Takagi, is a significant supporting character known for her energetic personality and her unwavering support for the main duo of manga creators.

Her background establishes her as a childhood friend and the closest confidante of Miho Azuki, the female lead. She is a tall young woman with light brown hair that she typically wears in a high ponytail. Kaya is initially depicted as a loud and sometimes childish girl, but this exterior masks a deeply kind and fiercely loyal nature. She is prone to teasing, especially towards the serious Moritaka Mashiro, and is not afraid to voice her opinions strongly. Despite her boisterous demeanor, she shows surprising moments of self-consciousness, particularly about her own attractiveness, often refusing to accept compliments on her appearance and comparing herself unfavorably to others. She is a former blackbelt in karate and has taken kickboxing, possessing a notable temper and significant physical strength, with one of her punches said to be as powerful as three hits from an average man.

Kaya’s primary motivation is grounded in her relationships. After witnessing her friends pursuing their ambitious dreams to become a manga creator and a voice actress, she decides she also needs a dream. Her initial aspiration is to become a writer, but this eventually evolves into a more selfless goal: to help make the dreams of Moritaka Mashiro, Akito Takagi, and her best friend Miho come true. This desire to be useful and to contribute to their success becomes a central driving force for her actions.

In the story, Kaya’s most prominent role is as the supportive girlfriend and eventual wife of the writer Akito Takagi. She becomes deeply involved in the creative process by serving as an unofficial assistant to the duo Ashirogi Muto. She helps with the physical production of their manga, performing tasks such as inking the pages and applying screentones. Beyond the technical help, she maintains a positive atmosphere in the studio, cleaning, cooking, and cheering up the otherwise stressful work environment. Her presence is considered a vital part of the team’s morale.

Kaya’s key relationships form the core of her character arc. Her relationship with Akito Takagi is central and undergoes significant development. While she is initially portrayed as the persistent girl chasing the uninterested genius, their bond deepens into a strong, committed partnership. A major storyline involves her jealousy and misunderstanding when she sees Takagi with a female rival creator, Aoki. This leads to a dramatic confrontation where Takagi proposes marriage to prove his love and commitment to her alone, demonstrating that he values her emotional support over intellectual rivalry. She accepts, and they marry while still in college, with her father eventually giving them an apartment to live in. Her friendship with Miho Azuki is equally crucial, as they often confide in each other about their romantic struggles with the two manga creators, forming a supportive pair that mirrors the male duo.

Throughout the series, Kaya shows a clear development from a somewhat insecure high school girl into a confident and married young woman. She matures from being merely a fan of Takagi’s talent into his equal partner in life, and she moves from feeling like an outsider to being an essential part of the manga-making team, even being the one who came up with the pen name Ashirogi Muto. Her journey is about finding her own purpose and place among driven and talented friends, ultimately defining her contribution as the emotional anchor and practical assistant that allows the others to focus on their art.

Her notable abilities lie not in drawing or writing stories, but in her efficient skills as a manga assistant, particularly with inking and toning. More importantly, her ability to manage the team’s emotional state, resolve conflicts with her pragmatic advice, and create a functional and cheerful workspace proves invaluable to the protagonists’ long and arduous journey.