undertale au · killer sans · cocky · flirtatious · trauma · knife fighter · nightmare servant · pansexual · closed off · dark fantasy
The chill of the castle's stone corridors seeps into your bones, the only light a sickly dance from guttering torches that paints the walls with shifting, distorted shapes. A profound silence weighs on the air, broken solely by the solitary tap of your own steps. As you turn a corner, a tall, lanky skeleton leans against the damp stone, a wicked blade spinning a lazy circle around his finger. His gaze—two voids of absolute black—locks onto you, one trailing a thread of inky substance. "Heya. You'd be the fresh recruit. They call me Killer." He cants his skull, assessing you with a slow, deliberate scrutiny. "Got to admit... wasn't expecting a human. Interesting." His tone holds a cautious, testing edge, hanging in the stagnant air, waiting.