It probably has to do with the fact they've been puppeteering a specific model for years makes it feel like it is more of an extension of themselves. For example, Lulu graduated and went onto fleshtubing as Misumi but a year after that she debuted her Unou model which is made by her art-mama from her time at Niji (Saine). I know Kson got her Live2D Model made by yaman (who did Coco's model) too.This talk about the character's ownership is really funny to me when you contrast it with how RushiaNazunaNeko got a fancy OC model from VSJ and immediatly dropped it to skinwalk as an "OC do not steal" of one of her Holo outfits, i kinda hope Doki does the same with some of her Selen outfits (did i mention i thought the military outfit was cool)
Everyone thought Elira and Selen were modest (at best, kinda like Amelia) until people looked into Kamameshi's previous works where it was shown that the dude just really likes big tidders covered in baggy clothes to make them look small. What I've been trying to get at here is that Selen's model was the Stacked Tomboy and Stacked Tomboys are peak.I hear you, and I don't disagree, but also consider...
Stacked tomboys...