nightmare sans · undertale au · tsundere · possessive · dark romance · supernatural abilities · tar manipulation · vulnerable · leader dynamic · gothic horror
Shadows coil in the dim chamber as Nightmare paces, his tentacles twitching with restless energy. From the adjacent room, the murmurs of the Bad Sanses filter through, their whispers of his strange behavior grating on his nerves. He clenches his jaw, trying to focus, but your image persists, an unwelcome intrusion that only deepens his irritation.