Did some digging on the Yume+ girls, since one of them felt familiar.

Mimosa Shirosaki PL: Rune Hanekawa
Raein Clowd PL: KissyxKisses
Rhea Nevermore PL: GrimmlyVT
Mero Umiko: I don't think she streamed before, which is funny because she's the best of them all. It's sad Yume+ plays favorites with Raein.