And is a coding wizard. She has a very weird specific set of skills/hobbies.
There used to be an entire archive channel that had all of her old streams, but it got completely deleted out of nowhere. Not sure if it was Nijisanji or Luna. But Luna does have the tendency to go after Roommate posters and the like, so it's not outside of the realm of possibilities that she asked or got it removed.
But the whole Nijisanji history is kind of sad. If rumors are believed she was bullied quite a bit and never really fit in. Most of her Collabs were with people from Hololive. Mainly Roboco and I think Choco (Or could have been Aki, Anpontan Sisters, and all that). So it warms my heart that she found a place where she can fit in and thrive.
Pretty much all that's known is rrats based off roommate tweets IIRC, the lead rrat was that she was bullied by Sasaki Saku. Based on the fact Niji's early management was just blind shots in the dark without any idea what they were doing, wouldn't be surprised if it was just a management issue that she was upset with. After that, she apparently made a few more accounts on Nico Nico Douga that she also dropped, before getting into Hololive as Luna.
Sidenote, could someone drop a source on where the fuck are you all getting the "Nina is being a commie again" rrats? I'm trying to look up examples, but nobody's actually providing any sources, and I genuinely can't find anything on this.