>>13577472If you're a man asking for advice you should make sure you're able to pull off a cute sounding voice, first and foremost. You can have the cutest design in the world but a masculine voice to pair with it just leads to a sense of incongruity.
But if we're speaking in a general sense, I've yet to see the "rich brat" shota archetype portrayed in VTubing. Typically it's characterized by elements like suspenders, shorts, and knee-high socks.
Think of characters like Ciel Phantomhive or even young Dio from Jojo.
Quite cute and quite underutilized.