1girl ahoge arknights armband bare_shoulders black_dress black_hair blue_sky breasts crab crocodilian_tail day dress grey_hair hair_over_one_eye knee_up long_hair looking_at_viewer multicolored_hair official_alternate_costume open_mouth outdoors pointy_ears shallow_water sitting sky sleeveless sleeveless_dress small_breasts solo streaked_hair sunlight tail tomimi_(arknights) two-tone_hair water water_slide yellow_eyes yuki_kawachi