A few questions for the greater population.<br/><br/>Is there a standard way of introducing, and using, NPCs?<br/><br/>If one has been created by someone else, within reason, is it OK to use that NPC without seeking permission? So, if I am not going to make any permanent changes to said NPC, e.g. kill them, and play them as they have been detailed, would it be OK for me to use that NPC?<br/><br/>Again, I am looking at the NPCs as a means to advance certain plot elements, or as background in scenes or locations. I am not looking at flooding he place with them, or making characters that make no sense in the context of the setting. But I thought it would be worth sounding out before I go and do something unwanted.