That''s what I was saying, ThoughtBubble was saying that you should be sure that all of the in-game characters have their own backstory and reasons for being there.
At spforge, when creating characters to be used for a pivotal storyline position, we shift our focus and pretend that the player was playing that character. That way, you force yourself to make sure that all his/her decisions make sense, and he/she has a solid backstory that gives him/her a tangible presence.
So ThoughtBubble was saying (I think) that you should not neglect the reality of the other characters. Or, to put it another way, don''t just throw them in there because you think they would be cool (or whatever else), make them real characters in the world.

George D. Filiotis
Are you in support of the ban of
Dihydrogen Monoxide? You should be!