Personal connections play a significant role in Takemichi's journey in the manga/anime series "Tokyo Revengers." Takemichi's personal connections, such as his friends from his past and present, his romantic interest, and even his enemies, serve as motivators, sources of support, and catalysts for his growth and development. These connections shape Takemichi's decisions, actions, and ultimately influence the outcome of his journey as he navigates through time travel and the complexities of changing the future.