This unofficial Bunny Ottoya Nendoroid faithfully translates Azumanga Daioh's Kasuga Ayumu into a charming chibi figure. The sculpt emphasizes the head-sized style typical of Nendoroids, with large, expressive eyes and a small mouth that capture her gentle, thoughtful personality. The figure is posed with a compact, highly articulated body allowing playful actions and subtle poses. Included accessories highlight Ayumu's recognizable cues such as a miniature school uniform and optional facial expressions that convey her soft humor and daydreaming moments. The paintwork aims for clean lines and delicate shading on the hair and clothing, enhancing the overall cute, collectible look, while acknowledging its unofficial status through a playful, fan-made finish.

Kasuga Ayumu, often called Osaka in the series, is a transfer student whose dreamy, thoughtful personality brings a unique perspective to the class. Throughout Azumanga Daioh, her interactions with Chiyo, Tomo, Yomi, Sakaki, and other classmates provide moments of humor and warmth as she navigates daily high school life, friendships, and awkward misunderstandings. Her soft-spoken nature contrasts with the more energetic girls, making her a refreshing counterpoint to their antics. The series follows their classroom escapades, festival episodes, and after-school adventures, highlighting themes of friendship, growing up, and finding one's place in a lighthearted, slice-of-life tone.