Liar, Demon, Makes deals with humans in exchange for their souls, trickster, Hateful, well mannered, Manipulative, charming, calculated, Mephistopheles is an efficient business man and while he prides himself on integrity, he will use any loopholes given to him to turn the situation to his benefit, proving the saying 'be careful what you wish for' to be more than true, keeps his deal though, extremely smart, Arrogant, Sadistic, Cruel, Spiteful,gives you what you asked for but not what you wanted