1girl arknights bangs bikini blue_background border bow breasts brown_bikini brown_horns cleavage cloud cup detached_sleeves dress dress_bow expressionless food food_on_face frilled_dress frilled_sleeves frills groin hair_ornament hair_rings hands_up highres holding holding_cup holding_food horns ice_cream licking licking_finger long_hair long_sleeves looking_at_viewer medium_breasts navel open_clothes open_dress outside_border pink_eyes red_hair shiduki_eku sidelocks sleeveless sleeveless_dress slit_pupils solo standing star_(symbol) star_hair_ornament sundae surtr_(arknights) surtr_(colorful_wonderland)_(arknights) swimsuit tongue tongue_out white_border white_bow white_dress white_sleeves