The old woman could be Ichiyo Haneda, Yasuharu's wife, and the baby one of her relative's. She may be spying on the protagonists for some reason, but since the Hanedas live in Beika it's no surprise she happens to pass by. High disappointment regarding Masumi vs. Amuro ; yet, we know each one of them has their own oldie they're related to (Yasuharu Haneda for Masumi/Mary ; Grampa Ooka for Amuro). Now I can't wait for the Naniwa case in August, maybe, as I suppose, Ginshiro Toyama is linked to the BO or something serious will happen there, endangering Heiji or Kazuha.