To be fair, from that twitter search, their last public interaction was all the way back in June 2023, while that doesn't mean they stopped being friends or anything in between, it doesn't necessarily means they kept contacting each other, which, assuming Uki kept being friends with her, it stands to reason he should know better than to invite stupid gossip to both of them, right?
At worst (which is gonna be common because of factors like tribalism, the bad reputation Niji carries, and Uki himself carries, etc.) , it does make it seem like drama fishing, and at best, he's either incompetent, retarded, or autistic, but not malicious, because you're telling me Uki has been streaming for 2 years and he just seemingly forgot all of this before sending the message?
The funniest outcome would be that they both forgot about each other, Uki recognized her, probably tried to contact her through other means, didn't work, and tried to make a public approach, which also didn't work.