Juan Rico is a fictional character from the science fiction novel "Starship Troopers," written by Robert A. Heinlein. He serves as the protagonist and narrator, detailing his experiences in the Mobile Infantry, a futuristic military unit. The story explores themes of citizenship, duty, and the moral implications of war. In the novel, Juan Rico enlists in the military after graduating from high school. He undergoes rigorous training and faces various challenges, including combat against alien species known as the Arachnids. Rico's journey reflects his growth from a young recruit to a seasoned soldier, highlighting the sacrifices made in the name of service.