Fate plays a significant role in the lives of the characters in Tokyo Revengers as it often shapes their destinies and influences their decisions. Throughout the series, the concept of fate is portrayed through various events such as time travel, past regrets, and the characters' struggle to change the course of their lives. The characters constantly grapple with the idea of whether they can alter their predetermined fates or if they are bound to a certain path. Ultimately, fate serves as a driving force that pushes the characters to confront their pasts and strive for a better future.