ryuuzaki ichi, gnosis (arknights), arknights, official art, third-party source, 1boy, aged down, black hair, black pants, black suit, black theme, buttons, feather hair, formal clothes, full body, long sleeves, looking at viewer, male focus, multicolored hair, official alternate costume, pants, peacoat, red hair, simple background, solo, standing, streaked hair, suit, tachi-e, transparent background, yellow eyes