Quentin Jacobsen is a fictional character from the novel Paper Towns by John Green. He is a high school senior who is infatuated with his childhood friend, Margo Roth Spiegelman. The story follows Quentin's journey as he searches for Margo after she mysteriously disappears, leading him to uncover deeper truths about her and himself. Throughout the novel, Quentin is portrayed as introspective and thoughtful, often grappling with his feelings and perceptions of reality. His quest for Margo takes him on an adventure that challenges his understanding of love, friendship, and the complexities of life.