>>107241272her toxicity was due to being menhera and chronically online, and maybe also the knowledge that "she" can't pass as female IRL.
if she likes catfishing dudes so much then that doesn't explain her meeting miyu since miyu isn't a dude.
more likely she was an early fan of miyu the vtuber, and attracted to that technology as it in theory lets you kayfabe as someone more attractive than you really are.
as a major financial supporter of the channel, miyu's bf would have let her stick around and be a mod, until the audience was big enough to be self sufficient.