Non "Nontan" Katagiri is a cheerful, affectionate figure with shoulder-length black hair, defined by steadfast patience and understanding in her relationship with a tsundere partner. She maintains warmth and kindness, perceiving his harsh words and aloofness as veiled affection. Unaware of his stalker-like habits—such as secretly photographing her or tracking her activities—she instead focuses on his sincere emotions, which she views as endearing rather than alarming.

Her background traces to middle school, where mutual nicknames solidified their initial romantic bond. Earlier elementary school interactions are acknowledged but lack elaboration. Family dynamics echo her own relationship: her mother’s playful teasing of her father mirrors the dynamic between Non and her boyfriend.

Her character evolves as an emotional anchor, counterbalancing her partner’s abrasive edges with unwavering support. Subtle growth emerges in her gentle nudges for him to express affection more openly, whether through verbal acknowledgment of their bond or overcoming embarrassment to use her first name. Exchanges with secondary characters, including her boyfriend’s younger sister and best friend, highlight her capacity to foster connections beyond their romance, often mediating tensions with her calm presence.