billy kid, billy kid (starlight), zenless zone zero, commentary, highres, 1boy, 1girl, black background, black jacket, black pants, bracelet, chain, chain around arm, chibi, clothed robot, ey3linr, finger gun, fur-trimmed jacket, fur trim, gun, handgun, holding, holding gun, holding weapon, horns, humanoid robot, jacket, jewelry, male focus, pants, red scarf, revolver, robot, robot boy, scarf, solo, spiked bracelet, spiked hair, spikes, torn clothes, torn scarf, weapon, white hair, yellow eyes