[X] A simple farmer, wielding sickle and wearing robe.
'Hello fellow human, I too, am a fellow human.'
More seriously, half of the time, when a non-human entity is trying to pass for a human in WHF it's for nefarious reasons. I'd rather change that, and be like in those japanese folk tales where a peasant helps an animal and it returns the favor.
Except it'd maybe be more like peasants helping out a random perfectly-human-not-at-all-a-fox-in-disguise traveller, and in exchange they have an extra-better harvest than usual (Ghyran), or their cattle are strengthened and less likely to turn beastman (Ghur), or a random waaagh/warherd that would raze the village to the ground passes through in the way to fight the dragon emperors but doesn't even notice the village is there (Ulgu).
Or something even more esoteric, but still benign, happens (High Magic).
[X] A mostly mortal seeming fox, clad in green robes, flowers sprouting up from the dirt where she walks.
This is also pretty nice imo, I like the fae-ish feeling it gives, also I am pretty sure (semi) benevolent nature spirits have been in short supply ever since the first incursion of the Ruinous Powers.
It also feels like the one that fits the best narratively, after all, that mortal called Menleth:
One of the foxes, not the least human, but not the most human either. They look at you with calm, placid eyes.
So going the route that goes in between 'full' spirit and 'full' mortal really appeals to me.
Perfectly balanced as all things should be.
It was them that won the foxes their freedom so it makes sense they'd take after the One Who Fed Last Meals. Thus they become neither spirit nor mortal.
Not one, and not the other, but instead both, and at the same time, neither, instead maybe something different, and maybe something new.