I am elaborating a rrat where Shiori was not allowed to collab with dubai until now.
As in, she and the rest of advent was specifically told not to.
Then after FES they had the tea party with Yagoo FWMC talked about, and this regulation was let loose. She might even be encouraged to do so. In part this was to boost the numbers of the guys. But it was also a marketing decision.
If we assume, as it appears, that advent is intended to be a idol gen doing stuff together, it would make sense to cover all bases.
So you have Nerissa for the twitter lesbians, FWMC for the hardcore unicorns, Biboo as neutral option, and now Shiori as the homobeggar rep.
