Fuyumi Fukagawa is a main character and a fellow student at the high school attended by the protagonist, Minami Tani. Her family owns a bakery called Fuwa Fuyu, which translates to Fluffy Winter, establishing her deep connection to the world of bread-making from an early age. She has a physical appearance typical of a teenager, characterized by blonde or yellow hair cut to neck-length, often styled with a hairband, and brown eyes.

In terms of personality, Fuyumi is depicted as having a very soft and gentle demeanor, which complements her warm and approachable appearance. Despite the physical strength she has developed from working in her family's bakery—leading to notably strong arms—her character and body are both described as being very soft. This contrast between her strength and softness is a notable aspect of her character. She is a loyal and caring friend, often showing affection towards her close circle, particularly her classmate Yuu Aizawa. This affectionate nature can manifest as a slight tendency towards jealousy, as seen when her friend Noa Sakura becomes close to someone new, revealing a clingy but endearing side to her personality. Fuyumi also appears to be conscious of her weight, and she and Yuu sometimes attempt to diet together, though her love for the products of her bakery likely makes this a challenge.

Fuyumi's primary motivation is intertwined with her love for her friends and her family's business. She takes clear enjoyment in sharing bread with others and spending time with her friends over their mutual appreciation for baked goods. Her role in the story is to be a supportive and warm presence within the main group of four friends, which includes Minami, Yuu, and Noa. She often acts as a bridge to the practical side of their passion for bread, as her family's bakery, Fuwa Fuyu, serves as a central gathering place where the friends can eat and even try their hand at baking. A specific episode focuses on her friends helping her with dieting concerns, which highlights her role as a source of gentle conflict and camaraderie within the group.

Her key relationships are with her three main friends. She has a particularly close and lovingly physical relationship with Yuu Aizawa, often seen clinging to her arm, which is depicted with visual cues like hearts, implying a deep fondness for her. She also shares a caring dynamic with Noa Sakura, where she is sometimes seen feeding her, further demonstrating her nurturing personality. Fuyumi is also the initial point of friendship for the protagonist, Minami, marking her as an integral part of the story's foundation.

Throughout the narrative, Fuyumi shows development in her interactions and her own self-perception. An episode titled "Fuyumi-chan's Diet" directly addresses her efforts to manage her weight, showing the support she receives from her friends, who help her bake miniature versions of her favorite melon pan. Another episode explores a moment of jealousy when Noa befriends a girl named Mai at a French bakery, which leads to a later episode where Fuyumi and Mai find common interests, suggesting a growth in her ability to overcome initial feelings of envy and form new bonds. Her birthday is December 29th.

Regarding notable abilities, Fuyumi is a skilled baker and has a strong understanding of bread-making, a natural result of growing up in a bakery. Her work there has given her considerable arm strength. Her hobby is making candy, which indicates a broader talent for creating sweets. Her favorite types of bread are melon bread and cream-filled brioche.