Sentients, though incredibly varied, are also quite similar in a great many ways, making it relatively easy to give a broad framework that can be easily modified to suit any situation. In terms of truly special Sentient foes and NPCs, it is best to simply create a character for them using the Rulebook as though you were making a character of the appropriate level. For simplicity's sake, every Sentient's statistics assume they are Medium, but any Sentient combatant can be Small, Medium, or Big.