Tony Webster is a fictional character from the novel "The Sense of an Ending" by Julian Barnes. He is a retired man reflecting on his past and the relationships he had during his youth. The story explores themes of memory, regret, and the complexities of life choices. In the narrative, Tony grapples with the impact of a letter he receives, which forces him to confront his memories and the truth about his former friends and lovers. The character's journey highlights the challenges of understanding one's own history and the nature of time.