What are the four specific elements of the Montonvert setting that establish the appropriate mood for the confrontation of Victor by his creation?
Well, the creature confronts Victor when he is there for solace. Victor recognizes that the creature has a right to express his feelings...the creature has very logically convinced Victor that he deserves his five minutes of fame.
The creature then leads Victor to a sheltered area that is warm and has a fire. Surrounded by the mountains and the calm that nature brings, the two can talk here since Victor, the human, needs to be warmed in this environment. Otherwise, Victor would freeze. The creature is otherwise unharmed by the elements of the weather.
My answer then would be the surrounding beauty and calm of nature, the shelter, the fire, and the creature's surprising ability to logically and intelligently converse. Victor is intrigued and follows to hear the creature's story.