Moona Hoshinova: I believe she recently finished university so my prediction is she gets a job in her field. I think it was architecture or design related if I remember correctly. Honestly, I think a case could be made for any of ID1 graduating this year.
Minna Vanilla and Sena Bonbon: I haven't watched a single stream but blind confidence says the whole Flavr idea will collapse in on itself. Honestly, seems like everyone got more than they bargained for and got two decent talents out of it that can become indie or enjoy the time they spent streaming. Things left for anyone to use are ripe to be infested by unsavory types eventually, generally sexpests and other undesirables. Gatekeeping these people won't work here because there's simply not enough people interested in it to keep it afloat. The general they made on /vt/ seems like it can hardly muster 30 unique IPs.
Mysta Rias: I've seen him talk about basically accomplishing everything he wanted to. He made enough money to be comfortable and talked about how streams will only focus on the fun heading forward. The fun will run out after the development of a new Luxiem group song ends up with Mysta posting the thing early on Twitter out of anger. This will lead to a statement by the NijiEN twitter that he's taking a break for two weeks with other NijiEN members sadposting in his wake. He comes back and everything seems fine for a month and then he graduates.