Episode 16 is where the Yucie plot really kicks into high gear arc's disguise as an old woman is peak magical shenanigans his quest to find Gunbard ties directly into the Eternal Tiara mystery and the revelation that he's Prince Arrow is a game changer Yucie has been looking for a prince who saved her as a child, and it might have been Arc all along . The festival costumes are a fun touch, especially Glenda dressing like her mother and Yucie being a cat .