Burun is a sports car with a bubbly personality and insatiable curiosity. He takes immense pride in his speed, thrives on racing, and possesses a strong dislike for losing. His activities focus on teamwork to solve community problems, frequently partnering with characters like Lets. Specific missions see him delivering forgotten children's lunches, guiding lost bakery trucks, reuniting separated vehicles, chasing thieves during patrols, mediating children's playground disputes, and delivering birthday cakes.
In the web anime continuation, Burun continues tackling similar cooperative tasks alongside new partners such as Moko, a tracking dog, and Fine, a fire truck, while encountering the antagonistic Guutan. The spin-off "Norimono Star-hen" features Burun in dedicated scenarios like high-speed chases and thwarting candy thieves, emphasizing his speed-based problem-solving. Across all appearances, Burun consistently uses his speed and mobility to resolve community challenges.