Fumi Yoshioka is a central character in the story, primarily recognized as the elder sister of the protagonist, Souta Tawara. Her background is deeply tied to her family’s traditional udon shop in the rural countryside, a place she has maintained and managed in the absence of other family members. She is depicted as a practical, strong-willed, and down-to-earth woman who balances her responsibilities at the restaurant with her personal life.

In terms of personality, Fumi is often characterized by her no-nonsense attitude and sharp tongue, especially when addressing her younger brother. She displays a high level of competence and pride in her work as a chef, upholding the standards of her family’s udon recipe. Despite her sometimes brusque exterior, she possesses a nurturing and caring side. This is most evident in her interactions with others, as she often acts as a pillar of support and voice of reason, particularly concerned with the welfare of her family and the preservation of their culinary legacy.

Fumi’s primary motivation stems from a desire to keep her family’s traditions alive and to manage the practical affairs of the household and business. While Souta often wrestles with his past and life choices in the city, Fumi represents the constant, grounding presence of home. Her role in the narrative is functionally significant as a supporting character who challenges Souta, provides him with a place to return to, and helps him confront his responsibilities. By running the udon shop, she creates the physical and emotional space where much of the story’s development takes place.

Her key relationship is with Souta, where their dynamic feels authentic to sibling rivalry—often arguing or teasing each other—but is underlaid by deep mutual respect and affection. She also forms a significant bond with the magical child Poco, often acting as a surrogate maternal figure or a patient caretaker. Through these relationships, Fumi exhibits subtle development. She learns to adapt to the chaotic and secretive situation brought about by Poco’s presence, showing flexibility in her rigid routine and a willingness to accept the unusual for the sake of those she loves.

Regarding abilities, Fumi is a highly skilled cook and udon artisan, knowledgeable enough to manage the restaurant entirely on her own. Her talents extend beyond cooking to include general housekeeping and business management. While lacking any magical attributes like Poco, her notable ability lies in her emotional resilience and her practicality, which serves as the stable foundation upon which the more whimsical or melancholic elements of the story rest.