MACZ2021, I can pretty much promise you that Kishi-san has not been forgotten. Kishi, which I understand means "Knight" in Japanese, is being downplayed but shown for a reason. If she was of less importance, she'd be shown and shelved like Shinobu-san or Inaka-san. The author is keeping her under wraps because I believe that he as an epic entrance for her in the future. As for now, her appearances are stoking mystery and anticipation.