it’s only a hypothesis, but between the mysterious teaser on Asa, and the new challenge on Kanezaka, is it possible that we will see a new mini-story about Hanzo interacting with the woman?
I suspect that the “vigilante” who mentioned Asa in the letter is Hanzo borrowing the identity of the fox, a bit like Ana pretending to be the goddess Bastet rather than the iconographic story of her as Horus in the Egyptian army.