1girl :d antenna_hair arknights arm_behind_back arm_up ba_kanoko bare_shoulders bikini black_bikini breasts cowboy_shot crocodilian_tail cup gavial_(arknights) greyscale hair_between_eyes highres holding holding_cup large_breasts long_hair long_sleeves looking_at_viewer monochrome navel official_alternate_costume open_mouth pointy_ears ponytail smile solo stomach swimsuit tail underboob very_long_hair visor_cap