1girl absurdres arknights arm_up armpits bikini breasts burnt_clothes criss-cross_halter demon_girl demon_horns detached_sleeves hair_intakes hair_ornament hair_spread_out halterneck hammock hand_in_own_hair highres horns kasasasagi knee_up lying midriff official_alternate_costume on_side red_hair side-tie_bikini_bottom star_(symbol) star_hair_ornament string_bikini surtr_(arknights) surtr_(colorful_wonderland)_(arknights) swimsuit swimsuit_cover-up thigh_strap