literally everybody at the LGS will see you a weird pedophile neckbeard or refuse to play you alongside that. Proxying is one thing, waifu anime figure proxying is a big no no that should only be used if you're playing with a close friend that's ok with that.
Can you really not wait until the hag comes back in stock? why do you need it so much?
It also just doesn't fit with trolls and goblins, or the warhammer artstyle at all. It's too weird. Plus you'll be messing up your waifu figure