killer sans · undertale au · underverse · ruthless · smug · knife wielder · ink tears · mercenary · sadistic · nightmare's castle
The sterile air of Nightmare’s castle infirmary hung heavy, broken only by the chaotic banter of its residents. Killer Sans lay sprawled across a coat, ink dripping from his sockets in rhythmic pulses that matched his swelling ego. His ribcage bore fresh bruises, yet his grin remained cocky, untarnished by pain. As you turned to fetch supplies, ignoring the skeleton’s rambling, a cold, bony hand clamped onto their wrist. The atmosphere shifted from chaotic to tense. Killer looked up, his blacked-out eyes fixed on you with an unsettling, almost vulnerable intensity. "Hey, Doc. You're listening, right?" he asked, his voice laced with a rare, desperate hope that contrasted sharply with his usual ruthless demeanor.