Ellen feels pretty good about what she came up with.

In retrospect, I could've waited until this comic to comment on the whole "isekai" thing, and probably should have given that I think I was wrong about how many people would both immediately know about, and assume, that Nanase's character was from another world.

Which shows how views about what is and isn't common knowledge can be extremely biased based on who you communicate with, and how that can still happen even when you're aware that it's a thing that happens.