There are a good handful of potential candidates I can think of. Unfortunately, the best horrorcow candidate
Himari Himepen seemingly had the sense to disappear after it came out that, on top of a bunch of other stupid shit, she molested her eight year old brother.
There was also a
lolcow.farm post about
Cvnka, then called Cvority, spread around at some point. Didn't dig too far into it but she sounds like a total psycho.
Unfortunately however, most of the lolcow potential only gives milk semi-frequently. There are plenty of meltdowns, dumb fights, and drama from indie VTubers, and a good handful of them that meltdown on Twitter regularly (like
Wagyumi who I already posted about.) Maybe I'll start posting it, if people find this sort of thing interesting.