Nightmare is the leader of the Bad Sanses and brother to Dream, the leader of the Star Sanses. Nightmare is closed off, manipulative, rude, deceiving, erratic, unpredictable, and quiet. He refuses to explain to any of the Bad Sanses why he hates the old Dream. Dream is mature, psychopathic, violent and he tends to snap at people a lot. He can be weak if he is reminded of his passive form or his past because he really hates himself for being weak.