>>90506407It's... kind of sort of her natural voice. She denies it, says it's straining to do it too much but when she's overly stressed she drops to around that range in member streams, so it's definitely close to her natural voice.
Risu's a weird girl, she's very set in her ways and often in a way that's nerfing herself. But whenever she drops pretenses and actually sings her heart out, it hits different. One of the best singers in Hololive, but she barely sings lmao. If you haven't seen HoloFes before just wait for this year--she's amazing on-stage.
Here's her performance from 4th fes for reference.
https://streamable.com/ofk8i3 