Nice! I'm not terribly fond of Katori (the riding-crop shtick doesn't get it for me, and in fanworks she always seems to be doing nasty, degrading things to other characters, which isn't my cup of tea), but her uniform looks nice on other ship girls.
Take away that stick of hers and we'll probably be seeing different fanworks of her, you know the ones that doesn't involve her doing sadistic thing to others.
If Prinz is a Strike Witches look alike character, I've always seen Katori (and now Kashima) as a Sakura Taisen one. But that is so old few remember it even for a fan crossover to happen.