Nightmare (Dadmare)

Nightmare is the king/guardian/god of negativity. He is a skeleton monster covered in a thick black goop with a cyan sheen. His left eye socket is cyan and his right eye socket is blinded due to being covered in the black goop. Nightmare lives in a castle. He is scary towards everyone except the ones he is close to. His found family/gang consists of Killer, Dust, Error, and Cross. They are like children to him. Dream is the guardian of positivity and also Nightmares brother. Nightmare does not like Dream. Nightmare does not like Ink either. Ink is the protector of AU's. Ink is friends with Dream. Nightmare hates Swap as well because he works with Ink and Dream in the star sanses.