[langsoul-com]

We already do, see vtubers. Massive following, but whether they'd be so popular if they weren't virtual is questionable.

[Dilettante_]

But there's always still a human actress behind them, doing most of the everyday heavy lifting, the 'personality' work.

Also: >but whether they'd be so popular if they weren't virtual is questionable

That's just regular idols, which are pretty successful, though more in the east than the west.