Nobu Andou is a close friend and loyal supporter of Capeta Taira throughout the anime Capeta. He first appears as a classmate and friend during their elementary school days, though his initial interactions with Capeta are marked by mild bullying, as he finds Capeta's lack of seriousness frustrating. However, once Capeta discovers his passion for kart racing and demonstrates genuine motivation, Nobu's attitude shifts completely, and he becomes one of Capeta's most dependable allies.

Nobu is characterized by a practical, grounded, and observant nature. He possesses a strong sense of loyalty and a sharp, analytical mind that complements Capeta's more instinctive and passionate approach to racing. His primary motivation is to support Capeta's dream of becoming a professional racer, but he also harbors his own ambition: to become the best racing manager in the sport. This dual drive makes him a proactive and invaluable member of the team.

In the story, Nobu serves as Capeta's technical assistant and manager. While Monami Suzuki takes on the role of self-appointed team manager and cheerleader, Nobu focuses on the mechanical and strategic side of racing. He helps maintain the kart, analyzes race data, and makes critical decisions to keep Team Capeta competitive despite their limited resources. His role becomes even more significant as the series progresses, particularly when Capeta's financial difficulties threaten to end his racing career. Nobu takes the initiative to present Capeta as a candidate for the Formula Stella Racing School, successfully convincing the officials of Capeta's talent and securing the enrollment paperwork. This act directly enables Capeta to move from karting into the world of formula car racing.

Nobu's key relationships are with Capeta and Monami. His bond with Capeta is the heart of his role; he is a steady, reliable presence who believes in Capeta even when circumstances seem impossible. Together with Monami, the three friends form the core of Team Capeta, each contributing different strengths. Nobu's own development is evident as he grows from a boy who initially misjudges Capeta into a capable, strategic manager who plays a pivotal role in Capeta's journey from a local kart track to the national and international racing scene.

Notable abilities include a strong aptitude for mechanical understanding and race strategy, combined with the organizational and persuasive skills needed to navigate the business side of motorsport. He effectively acts as a scout and advocate for Capeta, identifying and seizing opportunities that would otherwise be out of reach for a privateer team. Without Nobu's behind-the-scenes work, Capeta's rise through the racing ranks would not have been possible.