Kotaro Nogami is the main character known as Kamen Rider NEW Den-O in the Kamen Rider Den-O series and its related movies. He is the grandson of the original protagonist, Ryotaro Nogami. Kotaro becomes the new bearer of the Den-O system, transforming into Kamen Rider NEW Den-O to protect the flow of time from evil Imagin. Despite his brash and somewhat arrogant personality, he is courageous and determined, ultimately growing into a reliable hero who fights for justice.