Complex sentence: It is later revealed that Togami was actually the Super High School Level Swindler, who was posing as the original Byakuya Togami from the first game, and was incapable of living without copying another person's life.
Split into simpler sentences: It is later revealed that "Togami" was actually the Super High School Level Swindler, who was posing as the original Byakuya Togami from the first game. Apparently, the imposter was incapable of living without copying another person's life.