[[artoria pendragon (swimsuit archer) (fate)|Artoria Pendragon Swimsuit Archer]] in her First Ascension swimsuit from [[Fate/Grand Order]]. She wears a white bikini with a blue criss-cross halter and bows on the bikini bottom.

Note that this looks extremely similar to an [[official alternate costume|official alternate swimsuit]] that she's seen wearing in [[Fate/Hollow Ataraxia]] (post #2095987). This Ascension is most likely an adaptation of that bikini.