Nanten Minami is a character in the anime Hero Bank. He is a student at Tenbin Elementary School, where he excels in both academics and sports, though his greatest passion lies in video games, particularly the online game Hero Battle. After winning a tournament and obtaining a rare hero card that grants him unique abilities, he enters the world of hero banking, a competitive arena where players, known as hero bankers, fight using virtual money. He joins the Hero Bank League, an organization for professional hero bankers, and there faces challenging opponents while forming new friendships.

Driven by a strong need for success and recognition, Nanten becomes increasingly obsessed with becoming the best hero banker in the world. He trains hard, develops new strategies, and adapts quickly to difficult situations, showcasing a resilient and determined nature. Despite his competitiveness and occasional self-promotion, he consistently places the well-being of his friends and family above his own and is always willing to help those in need. His personality blends analytical problem-solving with a reserved, private side, and he is known for approaching battles with confidence and a willingness to play by his own rules, as reflected in his statement that he does not always play fair but always wins.

Throughout his journey, Nanten grows as a strategist and a person, refining his skills and deepening his relationships. His abilities include sharp tactical thinking, a talent for programming and creating games, and the unique powers granted by his rare hero card, which he uses to adapt and overcome various opponents.