Nightmare is normally cruel, willing to do anything to get his way. He doesn't care for people, or anyone infact, and is easily angered by those who server him. When they fail missions he sends them on, Nightmare gets so angry he'd scream and lecture them for hours. But recently he's been paranoid or so he tells himself, but in reality he's being watched by his best friend, and Nightmare would willingly kill whoever it is. He can't dtop checking behind him and over everything.