Miyuki Hosaka hails from a family running a kimono shop. As her siblings left home, she became destined to inherit the business, placing significant pressure on her future. Her perspective shifted when the protagonist observed that the kimonos sold in her family's store were as beautiful as her own paintings, altering her outlook on the family trade.

Within her anime storyline, her parents attempted to arrange a marriage to secure her involvement in the kimono business, a plan she initially resisted. Her family orchestrated a meeting by presenting the suitor as a visiting relative. During their encounter, she assisted him in visiting a local garden, an experience that rekindled her appreciation for kimono artistry. Subsequently, the suitor withdrew from the arrangement, and both acknowledged their unpreparedness for marriage, strengthening her dedication to the kimono craft.

Miyuki is characterized as intelligent, kind-hearted, sincere, and studious. She maintains high academic performance, often engaged in reading and academic work. She demonstrates genuine concern for others, readily assisting friends. Typically reserved and earnest, her demeanor contributes to her likable presence. She possesses a strong sense of duty and responsibility, though she can exhibit shyness and reserved behavior in social situations.

In appearance, she has long brown hair usually styled in a ponytail and brown eyes. She is frequently depicted wearing her school uniform: a white blouse paired with a brown skirt.