Charlie Citrine is a fictional character created by author Saul Bellow. He is the protagonist of Bellow's novel, Humboldt's Gift, which explores themes of art, identity, and the complexities of life in mid-20th century America. Citrine is a struggling writer and intellectual, reflecting Bellow's own experiences in the literary world. Throughout the novel, Charlie grapples with his relationships, particularly with the enigmatic poet Humboldt, who influences his thoughts and actions. The story delves into Citrine's search for meaning and purpose, showcasing Bellow's signature blend of humor and philosophical insight.