Human.
Exactly what you'd think human means, they are just plain old humans made of bone and flesh.
Automation.
These are machines, they usually have no will of their own but can be made from any material such as the strongest metals and alloys you can think of.
Living Dolls.
These are Dolls with a metal frame and porcelain skin and glass eyes, they are metal constructs with a human soul placed inside of them. They serve as the ultimate servant as they are obedient and loyal staying by their master's side even after death, they also make the perfect soldiers and workers as they neither require food nor sleep and function for weeks off of steam alone.