Not sure what happened to Navi in the end. My headcanon is that fairies for quests + healing "move on" after they fulfill their role for angst (but also because I can't imagine Navi leaving unless she had to?? that's her boy??), but regardless, I imagine Navi would dance around the topic of her departure.
Even after Link's coming of age journey, while there is a part of him that knows he will likely never see Navi again, he's still got that child-like whimsy his fairy will come back. She never said goodbye, after all.
