>>715461986
They're just streamers at worst and "talents" at best.
Talents being in quotes not to undermine them, but because it ranges from being dedicated singers to professional artists and such.
Kuroboshi, the artist behind Abby, is a vtuber for instance. He's a married 50-something year old man.

>>714559391
The only thing I know about FGO is that most of the artists for it are holo artists too.