Minamoto Nanako is the mother of Naomi Minamoto and the team manager of Endless Autohouse, the works karting team for which her son drives. She has medium-length brown hair and brown eyes. Her background is centered on managing her son’s racing career and the operations of the team. Her personality is marked by a strong competitive drive and a pragmatic, sometimes stern, attitude. She is quick to scold Naomi when he pushes his kart’s engine too hard during an early encounter with Capeta, revealing her focus on mechanical discipline and long-term strategy over momentary excitement. Her motivations are twofold: she wants her son to be a top racer, but she also secretly sees Capeta as a useful rival who can push Naomi to improve. She offers to help Capeta enter the world of kart racing not solely out of generosity but as a way to create a worthy opponent for her son. In the story, she serves as a supporting antagonist of sorts, representing the established, well-funded racing world that Capeta must contend with. She advises Capeta to take part in official races after witnessing his natural talent during a spontaneous chase with Naomi. Her key relationships are with her son Naomi, whom she manages and drives to excel, and with Capeta, whom she initially tries to recruit but later observes as a rival after Capeta and his father decline the offer. Her development is minimal, but she remains a consistent presence as the manager of a rival team. Her notable abilities include managerial expertise, strategic understanding of kart racing, and an eye for recognizing raw talent, as demonstrated by her immediate acknowledgment of Capeta's potential. Though she is not a driver herself, she plays a crucial role in shaping the competitive environment of the series.