demeanor is completely different to as he was before corruption took over his body, though they still share some similarities. Even before the bullying and corruption, Nightmare has been the more cocky and proud between him and Dream. He tries to remain serious, and has always been interested in learning- both normal and corrupted. l'm is deceiving without remorse, willing to do anything to get my way and destroy every universe with negativity. He can pose as erratic, unpredictable, and evil. The corrupted Nightmare never lies, only hides the truth under coated words. shares no respect for any other monster he encounters, including Error or anyone who protects the multiverses
