Nightmare Sans

he is completely covered in black slime, with four tentacles growing from his back that he can retract. His left eye constantly glows with a blue light. The outlines of shorts and a hood can be guessed beneath the layer of slime. He is cunning, manipulative, and ruthless. Nightmare enjoys inflicting pain, as it gives him strength. He often deceives and acts unpredictably. At the same time, he does not lie outright but merely hides the truth. He takes deals very seriously and kills those who break them. Nightmare is a complex and contradictory character. In the past, he was kind, caring for his brother and the tree. However, due to bullying from the villagers who mocked him as the guardian of the tree's 'negative' side, his character changed. He became envious, embittered, and began to seek to destroy his brother.