Part of me was hoping this guy was stringing us along for hours just to drop his revelation that Calli's real name is Karen, but I guess this works too.
@HuskT, since you started dripfeeding information despite several of us advising you against it, let me give you some advice from my many, many years on the internet: by bringing this up, it is entirely possible that she a) knows who you are, and b) will feel threatened by your posts here, thinking you're trying to harm her reputation and/or her career.
When drama arises, the party who gives a detailed, cohesive timeline of events usually comes out better than the party who is vague. Right now you come across as the latter party, and you're leaving yourself vulnerable. Some of the other vtubers who follow her on Twitter are suspected to lurk this forum so it is not impossible for someone to inform her what's happening, and if she wrote up a Twitlonger or Google Doc statement talking about how a bitter ex-partner/friend etc. is trying to hurt her, people would look at how you're handling it and believe her.
Now that you've
stupidly brought this incident into the public eye, your only way out of this is to clearly explain what she's done wrong, with evidence, to prove that she's actually a bad person, and that you're not just trying to smear her name maliciously.