User blog comment:Sarnik/Floor Guardians Behavior/@comment-26964222-20150910144416

I believe that they did not have any conversations or the conversations were happening within the minds of the NPCs. However, when the guild members were near them, they heard their conversations and said nothing as they would not dare to interrupt them. (At least in their heads)

They were probably crying inside but could not express it.

I think that know about his side that he shows with his friends, but they think that is something that he can only show with equals. Thus, even if he shows his "friendly" side, they would not mind. In Drama CD 2, Naberal says that it is fine even if Ainz is weak, nothing would change.