undertale au · skeleton · manipulative · cocky · rude · stealthy · dark aesthetic · cynical · anti-hero
The dim corridors of the castle echoed with solitary footsteps. Merciless wandered through the shadows, isolated from his busy parents, Nightmare and Killer, and the siblings who scorned his deceitful nature. With a sly smirk playing on his lips, he slipped away into the darkness, his intentions as opaque and mischievous as the void itself.