https://www.youtube.com/watch?v=tgziH04sQGcMonsterZ Mate is doing a TRPG stream. The numbers and stream are nothing special but I thought the voice guest was really nice sounding, and turns out she's a girl named Okada Ayame (picrel).
She's from an idol group called 2zicon Niji No Conquistador ( @2zicon on X). Some of their members seem to branch out promoting themselves into the vtuber sphere, for example Okada joining several TRPG streams from many vtubers.
https://twitter.com/2zicon2zicon is not that big of a group, tbhonest, and the only vtuber that follows their main twitter account is understandly
Aiba Uiha 