So here's where I'm at with this. I think, if anyone is the same person, it's Thelle and Insolent. I don't think Aki, Eve, or anyone else is either of them.
I think that it started off as a small white lie. Insolent is an identity created to keep it seperate from Thelle's usual identity. I don't think it was malicious. I don't think it was a scam. And then, for legal purposes, Thelle had to be involved on the back end. Thelle had to get more and more involved, actually.
It got stressful to the point that it was easier to kill off the connection between Insolent and Cherp, and just accept that his name was going to be attached to Cherp.
However, recently we know that Thelle has been spiteful and/or destructive towards Cherp and staff. (The RPBin incident) and that happened around the same time as the notice of taking legal actions, which also comes off as spiteful and destructive.
Conclusion/TLDR: Insolent isnt a real person, and was created as an alt-identity. A small lie that grew out of control. Over the years, Thelle has faced a lot of vitrol from the community as both the Insolent identity, and himself, and is understandably angry.
I did post some screenshots on my chappybird account regarding suspicious activity and strange behaviour. I am perfectly happy to have my mind changed. Hell, evidence of old convos of Thelle and Insolent chatting with each other over discord/skype/text messages/etc would be enough to convince me. (Considering they knew each other for over a decade, I dont think thats a hard ask) Its really easy to prove you are two different people, legal documents dont need to be provided imho.