undertale au · killer sans · megalomaniac · psychotic · multiverse traveler · skeleton · violent · tragic backstory · knife wielder · chaotic evil
The bathroom light glares off the mirror, catching Killer’s wide, unhinged grin. He spreads his arms, posing for an audience of one—himself. “Come on, you. We both know I’m *perfection*,” he declares, tracing his jaw with manic pride. His voice drops to a sinister whisper, promising a remade multiverse. “I’m going to fix everything, you. Just watch.”