Chiharu Hachiya is a gentle and quiet individual who serves as a stylist and top designer within the world of Aikatsu Friends!. She operates out of Production Room No. 3 at Star Harmony Academy and holds the position of top designer for the brand Sugar Melody. Chiharu is characterized by her compassionate nature, though she can also display a degree of naivety, such as when she once brought only microwaveable food on a camping trip.

Her appearance reflects her soft-spoken personality; she has long, soft brown hair typically worn in a braid over her shoulder, with bangs pulled back by a floral ornament that matches one on her braid. Her low, drooping mauve eyes, which contain flecks of pink, are framed by a pair of mauve eyeglasses.

Chiharu's personal history reveals that she was not always confident in her work. In the past, she lacked assertiveness in her designs and felt a distinct absence of passion for her craft. This changed with the arrival of Aine Yuki, who inspired a hope in Chiharu to believe in herself and bring her creative visions to life. Aine's genuine appreciation for Chiharu's dress designs, which she said made her heart pound, was a pivotal factor. This encouragement ultimately led Chiharu to formally establish her own brand, Sugar Melody, with Aine becoming its muse.

Her relationships are central to her development. Beyond her transformative friendship with Aine, Chiharu shares a close bond with Noa Himekawa, as the two were former colleagues who worked together in the same fashion company before they went their separate ways. Through these connections, Chiharu evolves from a passive designer lacking confidence into a determined creator who can fully realize her artistic potential. Her notable ability lies not in performance on stage, but in her refined skill for designing captivating stage outfits and her growth as a professional who can finally bring her unique aesthetic to life.