As a deadbeat, I will add some stuff I know from the song and dance of the UMG.
>What's the benefit?
Firstly, producing and founding, they probably will have a manager too. They will likely have easier access to a venue in the future, for example, it was them who pushed Cover to help her with a sololive. Basically a lot of good things for their singing ventures.
>What are the downsides
She has talked in the past about how it has been really a lot of job on top of what she has with Cover likely not a huge issue for them tho. They are quite nitpicky with budgets and what to do with it. I think that some covers can be a mess, so I don't doubt that's reason they went with "Univolt" rather than themselves.
>Does this mean that "X" will have a shot too?
No idea but probably no, Calli was the only one to join and still there's not been a lot following to that step.
>UMG or UMJ
I mean, she often refers to it as UMG, but she signed to UMJ since that's the subsidiary in Japan.

I was going to post it in the main thread, but I saw it's kinda ass, so I'll post it here.

on the + news Mori calliope will be having a collab on twitch with Castle Super Beast podcast next week