>>37160742It's a big deal for those nijisisters who wouldn't shut up about how superior Selen is who spam holobronies at everything. For them it's a huge betrayal for Selen to collab with them so I can easily imagine they'd falseflag outrage on the other side to try to pose some fake image of an all-out war and/or shift the blame away from Selen.
Nijifags also might have two layers of being mad because a lot of them thought Mumei was gonna join them instead.
Personally, I don't give a single rrat's ass, Selen is almost the safest-possible NijiEN to hang with actually, there's really nothing that off about this at all besides triggering nijifags. If HoloEN fans consider this worse than a male collab then their priorities are extremely fucked up. We already saw it was now possible because Kiara/Pomu collabed not long ago, so this is really not that crazy an event.