Handa works as a zookeeper at Panda's part-time zoo, having moved from Michinoku specifically for this role, which reflects his commitment to animal care. He is typically seen in his blue zoo uniform, complete with gray gloves, black sneakers, and an identification tag. Off-duty, he wears a green t-shirt with a red collar and a yellow number 6, a tan suit jacket, and khaki pants.

His personality is kind and diligent, both at work and in domestic routines. He takes pleasure in folding used shopping bags into triangles, collecting smooth stones, doing laundry, and tidying on his days off. Tamagoyaki ends are his favorite food. Socially, he experiences significant awkwardness, especially in romantic situations, and displays a strong susceptibility to fear, notably fainting after hearing ghost stories told by Sasako.

His primary narrative centers on his unrequited affection for Sasako, an employee at Polar Bear's Café. He visits the café hoping to interact with her but struggles to express his feelings, remaining unnoticed romantically despite their friendly rapport. Several episodes explore this romantic challenge. Panda, aware of Handa's feelings, arranges an unsuccessful group blind date to help him.

Professionally, his relationships are positive. Panda considers him a "boring guy but a good friend," tolerating antics like lunch theft while sometimes adopting a parental role through gentle reprimands against laziness. Conversely, Panda's sister Mei Mei develops a strong attraction to him, admiring his panda-like physique and viewing him as "handsome as a prince." He maintains respectful working relationships with other zoo staff, including his superior Kirino. Throughout the series, his romantic aspirations toward Sasako remain unfulfilled, forming a consistent element of his character development.