you can recognize her because reimu is wearing a pink hair bow without frills and because she has a "double" ponytail at the back, they almost look like hair rings, but they are not. and well, obviously because she wears that red "kimono vest", similar to the one she wore in touhou 1.
in the image Zun001.JPG his design is almost identical, with the difference that his hair bow does have frills
Artists other stuff is tagged ai-generated It's getting hard to tell these days, but something about the hand looks wrong, it has the correct number of fingers in the correct places, but it looks too poorly drawn when compared to the rest of the image, i also find it strange that the other hand is cropped away