Rintarō Hayashi, universally called Rin Rin, owns the flower shop Florist Rin Rin. He is human and possesses a deep, unwavering fascination with pandas, specifically fixating on Panda, a part-time worker at the local zoo. This admiration drives him to regularly give Panda flowers and maintain a collection of photographs taken using a pink digital camera. Though many female customers consider Rin Rin attractive, Panda does not return his attentions and often reacts with annoyance or avoidance. Rin Rin has black hair and eyes, typically wearing black glasses. His standard outfit consists of a pastel-pink shirt, a lavender scarf, khaki pants, and a black apron while working. His general demeanor is friendly and respectful towards others, though this varies as his focus remains overwhelmingly centered on pandas. He seems largely unaware or unconcerned about Panda's irritation over his overt gestures, frequently expressing confusion at Panda's cold responses. The tension between them stems from a specific misunderstanding. Rin Rin started leaving flowers for Panda, signing them only as "Rin Rin." Mistakenly believing a female admirer sent the gifts, Panda redoubled his efforts at the zoo to impress her. Upon discovering Rin Rin was the source—and confronted by Rin Rin's intense panda enthusiasm—Panda became disillusioned and actively distanced himself. Despite this rejection, Rin Rin's behavior towards Panda persisted unchanged. Beyond floristry, Rin Rin offers horticultural advice, demonstrated when he helped Panda create a floral arrangement to apologize to his mother after a gardening mishap. This incident showcased his practical plant knowledge and willingness to assist, though his underlying motivation still tied back to his panda interest. His single-minded dedication to pandas overshadows other social interactions and contributes to his inability to recognize boundaries, particularly regarding Panda’s discomfort. His role remains consistent across official media extensions like movies, OVAs, or spin-offs, defined by his unrequited, oblivious fixation on Panda.