Rent Generator Gawl (1998 - 1998)

Generator Gawl is a Japanese animated drama series about a group of time travellers who have been sent back to stop a historical event so they can change history and the battle they have with a fellow group of time travellers trying to keep the future as it is. The series follows Koji, Ryo and Gawl, the people trying to change time but on their quest they are hindered by assassins known as Generators who are intent on destroying the three of them and preventing them from changing the future.