Kyōka Minazuki is a student at the school where the story takes place, belonging to the mermaid race known for their clear voices and elegant demeanors. She is characterized by a generally cheerful and optimistic personality, often acting as a positive influence among her peers and serving as an uplifting presence in her classroom. Her primary personal motivation is a deep desire to become human, driven specifically by her wish to dance using her own legs rather than a tail, a goal she pursues with sincerity.

Within the narrative, Kyōka plays a significant role as a student facing the challenges of the school's curriculum designed to help demi-humans integrate into human society. A key moment in her development occurs when she is presented with a graduation assignment, a crucial test meant to evaluate her adaptability to the human world. During this period, she exhibits a pronounced stubbornness, insisting on completing the task entirely by her own abilities without assistance from her classmates. This behavior stems from a combination of mermaid pride and a personal misunderstanding that relying on others would somehow make her less human. Her refusal of help ultimately leads to her becoming isolated and struggling under the accumulated pressure.

This internal conflict places her at the center of a crucial character arc, where her relationship with her teacher, Rei Hitoma, becomes paramount. Despite his self-proclaimed misanthropy and detached demeanor, the teacher keenly observes her distress. He intervenes to break through her self-imposed isolation, offering guidance that helps her understand that accepting support is not a weakness and that interdependence is a part of being human. This interaction serves as a turning point for Kyōka, deepening the bond between student and teacher while contributing to her personal growth. Her key relationships also include her fellow students, who genuinely wish to help her, highlighting the supportive, if sometimes challenged, community within the class. Her notable abilities include her natural mermaid traits, such as a beautiful singing voice and graceful movements, which are often referenced in connection with her love for dance.