Unlike beasts, that don't usually attack with malice, enemies are creatures that basically want to kill you and they can range from humanoids to exceptionally intelligent animals to magical and psychic beings, many of which have a variety of special offensive and defensive abilites.

They may use power in physical combat or psychic in psionic combat and, although they are not as prone to run as beasts would, they generally don't stick around when things are not going their way. They cover all class levels with most being Class B through D with some rather formidable ones going all the way up to the Class F level. Here's a few examples of enemies:

Class A

     

Class B

        

Class C

        

Class D

        

Class E

     

Class F