The main problem is our dear developer, he created too many good looking characters and gave them souls. Many other devs don't bother with that, usually only main character. Now we all want them to be LI's. But, damm*t, Ayua and Nojiko should become LI's...
Yre, we have many really good-looking and memorable characters in the game, but I think, theorise that this reluctance with Ayua has the reason in the canon background, whatever that will be. But we´ll see.
Guys, there's something on my mind. Aren't WiaB and SG in the same universe? How will the big changes we make while playing Wiab affect SG ?
Well, there will be Ocean´s canon storyline wihch will be the background story here. And then there will be the myriad other "canon" stories in WIAB we players make there with our very own canon playthroughs.
And Ocean incorporates this in SG, for instance the many characters who could be the son/daughter/cousin of character xy in WIAB are made this way to allow for our various storylines. I would not be surprised if Nadia is Kat´s daughter, allowing the story of a romance of Willi and Kat in WIAB. It would also not surprise me if Nika and Nami are Daphne´s kids and so on. Ayua for instance must be Willi and Miru´s daughter, everything else would be a major surprise. And Ayua also has the Zane (and esp. Leia´s) trademark snake stuff connection. Ayua drives a "Viper" and it seems she has a snake or dragon tattoo.
While not every possible connection will be true in the SG autor canon story, it is all put in by Ocean to show players that their own WIAB story has influence, if only in a circumventional way.