Yukiya Himuro descends from the Yuki-Onna, a Japanese snow spirit heritage granting him supernatural ice-based powers intrinsically linked to his emotions. These abilities surge during moments of happiness or excitement, often triggering unintended localized blizzards or freezing objects he touches. Fearing this could inconvenience others, he initially maintained emotional distance, causing significant anxiety. Tall with silver hair and light blue eyes, he typically wears professional business attire. Exposure to high heat causes him to temporarily "melt" into a childlike form, reversing only upon cooling down. Despite a reserved and stoic exterior, he possesses a kind, humble, and considerate nature. He enjoys nature and animals, particularly flowers and cats, though his powers complicate these interests. He blushes easily and becomes emotionally flustered, especially around his colleague Fuyutsuki, whose practical support and calming presence he admires. His emotions frequently trigger uncontrolled power manifestations, like generating snowstorms when touched by Fuyutsuki's kindness or creating small, sentient snowmen when happy. Extreme fluster or lack of focus can cause him to slip into Kansai dialect. His development focuses on accepting and managing his abilities. Early on, he practiced intense mental discipline to suppress his powers during a work trip to Okinawa, avoiding disruption. With Fuyutsuki's encouragement—such as devising gardening methods that prevent freezing plants or helping him cool down in heat—he gradually grows more comfortable with his identity. This culminates in a mutual romantic confession with Fuyutsuki, establishing a relationship where they use given names privately. Key relationships include his younger sister Yukimin, sharing a bickering yet affectionate sibling bond; Katori, a childhood friend descended from a phoenix, whose energetic nature contrasts his calm demeanor; and colleagues like Saejima and Komori, whom he considers friends. Komori occasionally offers romantic advice, while Saejima provides grounded companionship outside work. His family name, "Himuro," means "ice house," and his given name, "Yukiya," means "snow arrow," both reflecting his heritage. His journey across official media depicts a shift from self-doubt to self-acceptance, emphasizing reliability and warmth beneath a cool exterior. His story arcs highlight everyday challenges and triumphs in professional settings and personal connections, without major conflicts or dramatic resolutions.