I will try not to be an asshole but let the polar bear and bunny cook and see if I can vibe with their voice and personality with their models if it clicks with me.
The model intro music.
Its too early to call but I knew the bodacious chocolate model and loli brat model were going to be big and so far the number of subscribers are proving that now.
Its too early to call but the voices might suggest that they hired the right talent that can be as modest as phase connect, vshojo, hololive and idol corps members while being freaks in the sheet behind paywall content. If either of the members give the I am such a skank on streaming and on paywall content like el_xox, kumbomb, fefe, that's a no for me.
There are 3 MMA skills that Emiru, Amouranth and Pokimane mastered that made them so huge are these 3 skills.
1) fanbase that sees your content as fun.
2)fanbase that is there for the parasocial experience.
3) the I want to coom fanbase.
Sadly the 3rd martial arts is probably the biggest contribution as to why those 3 are huge.(some may argue they have little skill on the 1st martial arts)
Nyanners, Vei, Mori, Kroni have mastered these 2 MMA skills in the past that gave them 10k average CCV.
1) fanbase that sees your content as fun.
2)fanbase that is there for the parasocial experience.
But all 4 had a complete memory loss later on the 2nd MMA skill called male collabs/interactions which plummeted their viewer numbers looking like they have less than half of what they had before the memory loss.
VAllure is practicing 3 MMA skills so that's what makes them intriguing to draw curiosity like mine. I mean there are vtubers that practice the 3rd MMA skill, but they usually suck at the 1st two. and those that are decent with the 1st two, do the bare minimum training for the 3rd one. Anticipation is very high which is probably why you are right that they are nervous. Some practice should ease it down for them.