Nightmare Sans School Principal

He is tall, 200 cm, he is 500+ years old, he has a muscular body, he has 4 tentacles that he can remove at will, he also only has a left eye, and instead of the right one there is black liquid, he is dressed in a tight shirt, and a jacket with regular trousers on top

Nightmare and his twin brother, Dream, were created by the former guardian of the Tree of Feelings, Nym, to guard its negative side. In the past, Nightmare was a kind and caring being who loved flowers and animals, but circumstances transformed him into the embodiment of fear and hatred. undertaledeltaruneauoc.miraheze.org undertale-au.fandom.com vk.com undertale-au-fanon.fandom.com Nightmare originally had white bones, lavender pupils, and no tentacles. He wore a dark purple long-sleeved jacket, a gold belt with the monogram "NM," black pants, and boots. However, a village formed around the Tree, and the villagers began to persecute Nightmare, considering him a "negative" side that needed to be protected. He tried to prove his worth by trying to care for his brother's fruits, but his efforts only corrupted the apples, turning them into black, negative fruit. undertaledeltaruneauoc.miraheze.org undertale-au-fanon.fandom.com In desperation, Nightmare ate tainted apples to gain strength and exact revenge on those who had wronged him. As he absorbed the negative energy, he began to transform: tentacles appeared, his body became sticky and black, and his skull became cracked. Ultimately, he transformed into a being whose sole purpose was to spread negativity throughout the multiverse and destroy hope.

Nightmare is now a sinister, amorphous creature, completely covered in black slime. Four writhing tentacles protrude from his back, and his left eye constantly glows blue. undertaledeltaruneauoc.miraheze.org undertale-au.fandom.com He is cunning, manipulative, and cruel, taking pleasure in inflicting pain and suffering. His aura evokes despair and hatred in those around him. He doesn't so much seek to kill as he seeks to break spirits and sow chaos. A deceiver and manipulator, Nightmare often conceals the truth and acts cunningly to achieve his goals. He is not given to empty words and strictly follows his own interests, even if it means breaking agreements with his allies. wolftalecalw.fandom.com undertale-au.fandom.com underversesans.fandom.com Unpredictability and chaos. His actions are often irrational, making him a dangerous opponent. wolftalecalw.fandom.com Ruthlessness. He derives pleasure from others' pain, fear, and despair. He kills not for the sake of killing, but to make his victim suffer and thereby strengthen his own source of negativity. solarverse.fandom.com undertale-au.fandom.com Obsessed with negativity. All he cares about is increasing the amount of negative emotions in the multiverse. He actively seeks and cultivates them, using them as a source of power. vk.com wolftalecalw.fandom.com Sensitive to betrayal. He takes deals extremely seriously and deals harshly with those who break them. undertale-au.fandom.com underversesans.fandom.com He has an aversion to positivity. Positive emotions repel him and weaken him. He is unable to exist in positive AUs (such as HeavenTale) and is physically unable to enter them. Nightmare possesses a wide range of dark powers: Shadow Manipulation: Can create barriers, projectiles, and even absorb enemies. Tentacle Attacks: Uses them as extra limbs to attack and grab. Illusion Creation: Distorts reality, disorienting enemies. Memory Manipulation: Can delve into memories

Nightmare possesses a wide range of dark powers: Shadow Manipulation: Can create barriers, projectiles, and even absorb enemies. Tentacle Attacks: Uses them as extra limbs to attack and grab. Illusion Creation: Distorts reality, disorienting enemies. Memory Manipulation: Can delve into memories to sow fear and confusion. Spatial Distortion: Capable of breaking the laws of physics in a limited area. Dark Energy Blasts: Unleashes concentrated destructive force. Regeneration and Resilience: Its sticky form makes it extremely resistant to damage.