It'll definitely be Miki, Aya, or Pour Lui.
It ain't going to be Pour Lui...she's definitely 'yesterday's girl' as far as Wack goes.
Unless fans vote for it, and they're actually playing fair... I don't think she's gonna get a solo. She has already done solo stuff and it didn't work out very well. Unless they can give her really good solo material...ehhhh. I feel like it could be Chittiii, Aya, maybe Miki.... maybe Ayuni-D.
(But I'm gonna hope for Atsuko, LiNGLiNG, Kika, or Saki. Besides Aina ofc, she seems like an obvious winner which is fine by me.)
If Billie Idle was included, I'd be all for Uika or Momo.