Lots of sprites got heavily updated over time in the original DMM game.
Nutaku localizations being what they are, we are of course stuck with old sprites and art instead of newer upgraded ones. This happens everytime when a new game comes
I find it weird. We got some things that the JP version didn't start with, such as the "Gathering" mechanic, which makes the early grind for us easier. But they didn't update what really matters for this game, the girls and their new sprites. Which is a shame since the DMM version have recently been updating all the 4* girls with their own unique sprites, even though they matter less in the current JP version saturated with gold event units and reruns.
Now most players who started the Nutaku version will probably never see them since they will, or already have, gotten bored of the old copy pasted sprite models.
On a completely unrelated note, it's finally happened: