[At the word "monster," he twitches slightly--and it is a guilty one. It's pretty obvious he has reacted in a way to confirm that yes, he is indeed a monster. Twilight caught him off guard. Talking purple horse, how much do you know?! The response comes out a little too quickly, sounding almost defensive...or like he's trying to convince himself of something.]

I exist only for battle. You draw too many conclusions.