The character known as the Owner in Kamikaze Girls, identified in the story as Akinori Isobe, is the proprietor of Baby, the Stars Shine Bright, the Lolita fashion boutique based in Daikanyama, Tokyo. The shop is the favorite brand of the protagonist Momoko, and the Owner's establishment represents the center of the Lolita fashion world that she admires from her rural hometown. His presence in the story comes from his position at the head of this brand, which makes him a figure of professional authority and artistic taste within the world the characters inhabit.

In terms of personality, the Owner is portrayed as a discerning and somewhat reserved businessman with a genuine eye for craftsmanship. When Momoko visits his store wearing a bonnet whose damage from a mouse she had concealed with her own embroidery, he immediately notices the quality of her needlework and recognizes her skill. This ability to appreciate and identify artistic talent is central to how the character functions. Beneath his professional composure, the story suggests a more personal layer: he speaks of not needing friends, but he privately regrets having given up close friendships for the sake of pursuing his dream of building the brand. This quiet regret mirrors the isolation that Momoko herself experiences, even though his path in life is very different from hers.

The Owner's motivations center on the success and artistic integrity of his fashion label and on finding and nurturing talent that can contribute to it. His enthusiasm for Momoko's embroidery leads him to contact her and commission her to embroider a jumper skirt for the store's display, a significant opportunity that gives her skill official recognition. Later, when a model is injured during a photo shoot for the brand, Ichigo is asked to fill in as a model, and it is at the Owner's advice that she begins to pursue part-time modeling work. He also suggests that Momoko come to work for Baby, the Stars Shine Bright, though she turns the offer down, preferring to wear the clothes she loves rather than make them professionally, and instead decides to act as Ichigo's manager.

His role in the story is primarily that of a mentor and professional catalyst. His recognition of Momoko's embroidery transforms her talent from a private hobby into something publicly valued, and his boutique serves as the destination for her trips to Tokyo and the source of her dreams. His relationships with the two protagonists are therefore professional in nature but personally significant. With Momoko, he acts as an appreciative patron who validates her craftsmanship; with Ichigo, he provides the unexpected entry point into modeling that broadens her options beyond the biker gang.

The Owner himself does not undergo a major character arc or change of beliefs over the course of the story. His importance lies instead in the effect he has on others, and his own internal conflict about choosing ambition over friendship adds a note of caution to his advice. His notable abilities are rooted in his professional life: he runs a successful fashion brand, possesses a sharp eye for fine embroidery and design work, and has the business judgment to recognize and promote new talent. Through these qualities, he functions as the representative of the fashion industry that the characters aspire to engage with, and his approval carries real weight in their world.