2boys, android, back-to-back, black_hair, blue_eyes, body_writing, brown_eyes, cable, character_name, copyright_name, facial_mark, forehead_mark, from_side, glitch, glowing, glowing_eyes, gon_freecss, grey_hair, hunter_x_hunter, killua_zoldyck, letterboxed, looking_at_viewer, looking_to_the_side, luye_yuan, male_focus, mechanical_parts, multiple_boys, nude, outstretched_arms, portrait, profile, short_hair, white_background