In "Tokyo Revengers," the characters grapple with the concept of fate and free will in various ways. Some characters believe that fate is predetermined and inevitable, leading them to feel powerless in changing their circumstances. On the other hand, other characters believe in the power of free will to shape their own destinies and make choices that can alter the course of their lives. Throughout the series, the characters struggle with the balance between fate and free will, highlighting the complexities of these philosophical concepts in their lives and decisions.