Humanoid/Alien Humans; may appear as humans, or human-like. Able to communicate. Can also be used on aliens with part-animal features that have small bodies (smaller than a regular giant, but still bigger than a normal human).
Machines; can be controlled by a pilot, or may act individually.
Ground; land-moving, has animalistic/monstrous forms.
Bird; air-type, can freely move above ground/out in space.
Fish/Aquatic; water-type, have features that may appear like that of aquatic organisms. Possibly amphibious.