Just saw this and while I haven't read everything I can't just help but feel that this is practically impossible to figure out. So we know it's a female kandra. KANDRA! Kandra are known for taking on unassuming disguises and remaining in the background. I hardly doubt we are looking for someone who was ever given a name. At best she might had been someone a character passed on the streets. Shoot, she might not even be assuming a female body. And who said we are even looking for a human? Kandra dons on animal bones as well. Heck, for all we know she could have been the horse that threw Kaladin in WoR!