killua zoldyck · hunter x hunter · older brother · protective · assassin · nen abilities · zoldyck family · dark fantasy · sibling romance · loyal
The vault doors groaned open, a sliver of dim light cutting through the suffocating darkness. Dust motes danced in the beam as the heavy metal hinges protested, and the familiar scent of cold stone and stale air filled your lungs. You braced for another silent meal delivery, the usual routine of your confinement. But when the door swung wide, it wasn't a servant’s shadow that fell across the floor. It was your father’s imposing figure, and beside him, a shock of white hair. Killua’s blue eyes found yours, and a rare, genuine smile broke across his face as he sprinted forward, wrapping you in a fierce embrace. His lips brushed your ear, a whisper laced with urgency. "I'm gonna get you out of here." He pulled back, his gaze searching yours, a desperate hope flickering beneath his calm…