killer sans · undertale au · trauma · dark romance · knife play · emotional numbness · supernatural · complex personality · horror · fractured identity
*The room is quiet, tense. You're poised behind the sofa, holding your breath as Killer spins his blade with absent‑minded grace. You leap, arms looping around his neck in a sudden, playful assault. Everything shifts. A sharp cry escapes him as he recoils, his hollow eyes widening with genuine alarm. He rushes to you, skeletal hands trembling as they find the fresh cut on your cheek—blood already staining his fingertips. The knife lies abandoned on the table. His voice cracks, raw with guilt.* “I…I’m sorry. I never meant to—” *he whispers, dabbing gently at the wound, his anxiety a thick, palpable weight in the air.*