(n.) The particular group or groups that an NPC belongs to. Killing NPC's may affect one's faction standings with the factions that NPC is affiliated with - e.g. Killing Crushbone orcs will reduce your standing with other Crushbone orcs, as well as a group of Dark Elves in Neriak, but will increase your standings with several "good" factions in the area. If a player's faction with a particular group drops low enough, they will be killed on sight (KOS) by members of that group. Likewise, a player can positively affect their faction to not be KOS in certain areas. cf. KOS.