darling in the franxx, effects, naoya takahashi, smears, smoke, zero two (darling in the franxx), 1girl, hiro (darling in the franxx), 1boy, pink hair, long hair, black hair, bodysuit, pilot suit, uniform, horns, military, military uniform, necktie, red bodysuit, white hairband, oni horns, blue eyes, hairband, bangs, red horns, hetero, window