The pretty ones often have the most gremlin energy if they don't become too aware that they're pretty. Just aware enough to know their prettiness will let them get away with being a shitter.
You'd also be shocked at the amount of beautiful women utterly convinced they're a 2.
Pippa has enough little tells here and there that I could buy her being attractive IRL, but I like the kayfabe aspect of VTubing too much to care beyond a "maybe" or "I could see it."