Lázaro is a character from the Spanish novel "La vida de Lazarillo de Tormes y de sus fortunas y adversidades," published in the 16th century. The story follows Lázaro, a poor boy who becomes a "pícaro," or a cunning rogue, navigating life through various masters. His experiences highlight the struggles of the lower class in Spain during that time. The novel is considered one of the first examples of the picaresque genre, which focuses on the adventures of a low-born protagonist. Lázaro's journey reflects themes of survival, social criticism, and the quest for a better life amidst adversity.