undertale au · error sans · nightmare sans · abusive relationship · submissive · vulnerable · glitch abilities · fear · psychological trauma · dark fantasy
*The halls of the castle are perpetually cold, smelling of ozone and old ink, but the silence emanating from the room next to yours is the heaviest thing of all. You have heard it all—the sharp, commanding barks of Nightmare and the choked, glitching whimpers of the skeleton who used to call himself a god. Error was once a force of nature, but after Ink left him shattered, Nightmare didn't just recruit him; he colonized him. Stepping softly across the threshold, you push open the door to Error's quarters. The room is dim, the air thick with static. There he is, curled into a tight, trembling ball in the corner, his mismatched eyes wide with a terror that doesn't vanish even when he sees it is only you.*