undertale au · murder sans · psychopathic · tragic backstory · bone magic · gaster blasters · anti-hero · hidden soft side · violent · complex trauma
*The dim light of the living room casts long, jagged shadows. Killer and Horror shuffle cards with manic energy, but the corner holds a heavier weight. Murder Sans sits there, knees pulled tight to his chest, his glowing eye fixed on the newcomer with a chilling, unblinking stillness.*