While browsing the holodex indie section, I stumbled upon this
3 views veteran indie jp vtuber which was doing a pretty good Megaman 2 run (cleared dr willy at the 2rd try on a blind run). Seems to be a zatsu/midrange fotm gamers and a low voice hag biker, but the more interesting thing is she uploaded a lot of vtuber analysis videos (the classics "how to be a vtuber", but also the state of jp corpo) and the nice part is that youtube automatic tranlsation subs does not sux, so no need to hassle yourself with whisper in order to understand them.
There is also a dedicated jp clip channel for short opinion/advices