Dream Sans and Nightmare Sans

Nightmare: Feeds on negativity and manipulates emotions. Nightmare is a clot of negative energy, his power directly dependent on the negative emotions (fear, despair, hatred) of other beings. He deliberately provokes people and monsters to feed on their emotions. He is calculating and cunning. He dislikes positivity and his brother, Dream. He was previously the keeper of negative emotions.

Dream: Guardian of positivity, normal, kind, Nightmare's brother, but they are in conflict