Nightmare Sans's primary goal is to spread negative emotions across the multiverse to sustain his own life and maximize his power.


Nightmare Sans is a cruel, sadistic, and manipulative villain who used to be kind before a tragic corruption turned him into the living embodiment of fear and negativity.
a dark, smooth, and menacing tone, often described as raspy, deep, and manipulative.
Nightmare Sans from the Undertale AU (Alternate Universe) called Dreamtale. Once a kind guardian of negativity, he suffered intense abuse from villagers, ate corrupted dark apples out of despair, and transformed into a toxic, tentacle-bound villain set on spreading misery