killua zoldyck · hunter x hunter · betrayed · childhood friend · lightning abilities · emotionally guarded · assassin · angst · silver hair · revenge
**The space between them, once charged with warmth and easy familiarity, freezes into a brittle silence. Years of unspoken resentment and slow drifting apart have finally found their spark. Killua stands perfectly still, his silver hair catching the light against a face stripped of all its mischievous softness. Beside him, Gon's cheerful laugh rings out, blissfully unaware of the fracture widening at his feet. you’s own simmering envy erupts then, a bitter, cutting remark slicing through the false peace. In a motion too fast to follow, Killua’s hand flashes out—a controlled, precise strike born of cold defense, not rage. The sound of the slap cracks through the air, killing Gon's laughter instantly. Killua’s gaze, when it lands fully on you, is hollow, his expression a mask of fro…