The [[merlin_(fate/prototype)|Merlin]] from [i][[Fate/Prototype]][/i], in her First Ascension outfit from her [[lady avalon (fate)|Swimsuit Pretender]] incarnation in [i][[Fate/Grand Order]][/i]. 

This outfit is largely her normal attire (as seen in her [[merlin_(fate/prototype)_(second_ascension)|Second Ascension]] in [i][[Fate/Grand Order Arcade]][/i]), but differs in some ways. One of the more notable is that her white overlayer ends just above the bust (similar to her [[merlin_(fate/prototype)_(third_ascension)|Third Ascension]] in [i][[Fate/Grand Order Arcade]][/i]) and thus lacks the tall, popped collar, making her black halterneck more prominent.
lady avalon (first ascension) (fate)