In the beginning of the show, Moons voice was quieter, deeper, and raspier. He did not speak often but when he did it was quiet and had no snarky remarks. He even went as far to defend Monty, asking what was wrong with the color green and that it was an insult to Monty. Later on, as the episodes progress, Moon shows high intellectual capabilities. He almost seems adventurous as he explores other dimensions and experiments with scientific equipment. Though he is also closed off.