To me, the funniest thing about the idea of Tesla and Einstein being in Star Rail is the sheer difference between how Welt is seen in his own universe and how he's seen in Star Rail.
In hi3, literally no one thinks of him as this reasonable old man who knows everything. He's not a member of a group that befriends governments. He's a fucking terrorist. He's a little shit. He's a bad influence on Bronya despite being a good dad to mini Joyce.
Also, almost no one respects him. Everyone is constantly calling him pathetic and stupid. Even his own Himeko thinks that he's a pathetic dumbass. Tesla especially thinks that he's a pathetic dumbass, and is the single most vocal person about it.
And coincidentally, the only person from hi3 who DOES think of him as a wise, reasonable person is Void Archives themself. The only person who came to hsr with him.
If Tesla and Einstein were to show up in hsr, they're going to hear someone like Jing Yuan being all like "Mr. Yang is very wise and calm. We are proud that he has chosen to help us in the past" and Einstein would be like "wow, I thought he would be on your wanted list." And Tesla would be like "oh my god has my stupid dork finally gained social skills?!" And everyone else would be "...what???"
