Robots are the mechanical beings that coexist with humans in the Astro Boy universe. At first, they were meant as mere tools for humans to use. However, as time goes on, humans begin to realize that they are becoming more like them every day. Some humans found this to be enjoyable, but others began to grow afraid of them. Through misunderstandings and misconceptions, both humans and robots began to enter a dark age. Usually, a key point of the different versions of the Astro Boy series is the free rights of robots everywhere.