Mina Hibino is a supporting character in Teasing Master Takagi-san: The Movie. She is a cheerful, energetic girl with thick eyebrows and a lively spirit. Among her classmates, she is the smallest in stature but one of the most outgoing in personality. She is often seen in the company of her two closest friends, Yukari Tenkawa and Sanae Tsukimoto, with whom she forms a tight-knit trio. Her background places her as a middle school student on the island where the story takes place, and she is the cousin of Sumire Hibino.

Mina’s personality is defined by her constant optimism, impulsiveness, and a tendency to act on whims without much forethought. She is kind-hearted, bubbly, and frequently the source of comedic relief through her hyperactive antics and lack of focus. Around Yukari and Sanae, she is especially playful and noisy, often dragging them into her spontaneous ideas. Despite her sometimes scatterbrained demeanor, she is deeply loyal to her friends and genuinely cares about their happiness and the strength of their bond. Her primary motivation throughout the film is to preserve the closeness of her trio, as she fears the changes that come with growing up.

In the movie, Mina’s role centers on her reaction to the news that Sanae is considering attending a high school in the city, which would separate the friends after graduation. To counter this possibility and make the most of their remaining time together, Mina takes the initiative to create a list of one hundred activities they can do during summer vacation. This list becomes a driving force for several of the trio’s scenes, showcasing her proactive and earnest desire to create lasting memories. Later in the film, at a summer festival, Mina is visibly relieved when Sanae announces her decision to remain on the island for high school, reaffirming the trio’s continued companionship.

Mina’s key relationships are with Yukari Tenkawa and Sanae Tsukimoto. Yukari, the more mature and romance-obsessed member of the group, often finds herself exasperated by Mina’s boundless energy but remains a steadfast friend. Sanae, who is deadpan and athletic, frequently teases Mina in a playful, dry manner, and the two share a slightly antagonistic yet affectionate dynamic. Together, the three friends form a balanced unit where Mina provides the exuberance, Yukari the sensibility, and Sanae the grounded humor. Mina also has a distant cousin relationship with Sumire, though this is not directly explored in the film.

In terms of development, Mina undergoes a subtle but meaningful arc that reflects her growing awareness of the passage of time and the value of friendship. Her decision to compile the summer bucket list demonstrates a maturity beneath her childish exterior, as she takes concrete action to hold her group together. The emotional payoff comes when Sanae confirms she will stay, allowing Mina to fully enjoy the festival fireworks with her friends, content that their bond will endure beyond middle school. In the broader timeline of the series, later spin-off material shows that Mina eventually becomes a kindergarten teacher and a mother of three children, maintaining her cheerful and caring nature into adulthood.

Mina does not possess any supernatural or extraordinary abilities. Her notable traits are her remarkably high energy, her ability to lift the mood of those around her with her relentless positivity, and her knack for devising fun, spontaneous activities. She is also recognized for her thick eyebrows, which are a distinguishing physical feature. Her voice and presence bring lightness to the film’s more sentimental moments, ensuring that the summer vacation is filled with laughter and warmth.