It's somehow weird and funny at the same time that most supporter for Impa to join Smash always goes back and forth in terms of choosing a design for her in Smash.
Like for instance, before the first Hyrule Warriors came out people uses Impa design from Ocarina of Time as the image of her and people always preceive her at best being an echo of Sheik due to low screentime of her doing some action and the fact that she's the person that teach Zelda various Sheikah technique.
Now move forward when Hyrule Warriors came out and her design from that game has been a staple for various fan moveset and interpretation replacing her OoT design until the early days of Ultimate's Fighter Pass 1. Now her status as a clone of Sheik seems to died out due to her use of naginata as her primary weapon in that game as well as her giant sword and being a Character that relied more on momentum to strike her opponent while still being fast.
Now move forward to today and Age of Calamity has been announced or should I say been released and her design from that game, smartly titled as 'Young Impa' is now her current design that is often portrayed. Unlike HW Impa' who's just an upgraded version of her design from Skyward Sword and is from a spin-off game that is not canon to the series, which is often laid out as one of her cons is now gone completely gone when AoC arrive, which is a prequel to BoTW, the same game where the design of Link in Smash hails from. Now instead of her being an old lady that wield oversized weapon now becoming a pretty young girl that is considered by many to be waifu material and is basically a Naruto character.
This meme basically sums up the changes and struggle the fans has with her which is honestly the only time that this situation ever happen for a character.