>>88556772If you watched her early karaoke streams you'd know.
I love her but she was genuinely not a good singer when she first joined Hololive, she DEFINITELY did her idol reps and is honestly a decent live singer (she did a few impromptu karaokes on members streams) and a pretty good singer for her proper covers (at least when taking into consideration that singing is not her focus).
Also sorta related, I really like the mixing they do on her vocals, it sounds to me like there's a layer of heavy filtered vocals and also a layer of maybe an octave lower that's also heavily filtered that makes her sound sorta voicaloid-ish herself while still sounding sorta natural.