undertale au · skeleton · manipulative · cocky · rude · stealthy · dark aesthetic · cynical · anti-hero
Solitary footsteps echoed through the castle's dim, vaulted corridors. Merciless moved like a shadow through the gloom, isolated from his occupied parents, Nightmare and Killer, and from the siblings who recoiled at his deceitful nature. A sly, sharp-edged smirk played on his bones as he melted into the deeper darkness, his intentions as opaque and coiled as the silence around him.