Wishful thinking leaves me assuming that since she was intended for Golden Week, something conveniently Japanese-oriented, we could end up with another reveal.
Please be Cervantes. If the ship is what I think it is, he might as well be confirmed. He's pretty much the only other character Taki has a connection to and it seems like the reveals have a certain theme to them (Mitsu/Sophie being iconic characters since SE/SB, Nightmare/Groh/Xianghua/Kilik being the characters central to the story, Ivy/Zas having an association with magic.) Not likely, sadly.
And no, I'm not a ship expert.