Eyy, it's
Towa! I remember talking about her once or twice in the first thread, and yes she is from a ero-doujin. If we want to be a bit technical, she's from a set of fanart involving gyarus (literally titled "Huge Breasted Gyarus") drawn by her artist papa, Satou Daiji/Armadillo_Daiji.
I think at some point the character got redesigned as a vtuber character, turning her from a simple and atypical "Highschool Gyaru that probably eat shotas for breakfast" into highly sexualized but still gyaru cabaret bunny girl vtuber. Pretty decently popular (not sure how many her CCV is but I assume to be at least 2view level), but mostly JP fans all around, which is why I'm quite surprised that someone finally made a EN TL clip of her.
Nowadays I used her streams as background noise (partly because she has a swimsuit themed L2D in which she's basically on all fours.... very yabai) because her voice is quite deep and pleasant but early on she is quite fun to watch, especially when she's often in voice chat with her artist papa to act as her coach for stuff like her first time streams of playing Arknights, etcetra.