>>538012242
normally each banner is 21 days
so 21+21 + 21+21, so 84 days
however since last banner was 1 week longer, i heard both seed and orphie will be 1 week longer each to return to schedule, so 84+14, 98 days
and that's if zhao is the first banner of 2.4 at all
so basically either start of december or zhao at christmas time
since her faction is "krampus", my guess is she'd be first and Void Hunter

but the devs seem to introduce the secondary characters first.
>we met fufu before we met shifu, the void hunter
>we met manato before we met yuzuha and alice
chinatsu is also speculated to be the A rank of the idols, if any of them are
so who knows, zhao could be second, after the real Void Hunter