Manual:DIL Manual UNIT ST NPC - Seifert69/DikuMUD3 GitHub Wiki

if the type is UNIT_ST_NPC 

      'defaultpos'   :integer (RW)
         The default position of an NPC, see POSITION_* in values.h and/or vme.h
	  'natural_armour'   :integer (RW)
	     The natural armour of the NPC when naked.
      'npcflags'     :integer (RW)
         Some small options for NPC's see NPC_* in values.h and/or vme.h
		       'switched'   :unitptr (RW)
			      Character that is switched into this NPC.