Great! Then Merrin will try to figure out in what order she needs to go to concisely explain all of the concepts that make "analogous in some way I don't fully understand to an alternate-universe fanfiction crossover plot" make any sense whatsoever as a phrase.
The headband is really helpful but mostly because it gives her a bunch of mental bandwidth to wrangle how mortifying it is to be seriously explaining something this silly. Yes Merrin is aware that feeling self-conscious and embarrassed about sounding stupid is by FAR not the most significant problem here. Her brain is silly like that, she knows that.
"So in dath ilan there are fictional stories, right," she says. That can't be an entirely new concept, surely, his world has to have that. "Some of them are set in a world that looks basically like dath ilan, but a lot of them are in alternatephysics fictional settings that have magic. There are thousands of original settings, but patterns show up..."
Merrin will be pretty brief about alternatephysics tropes but she is pretty curious how trope-y Golarion will sound, to her, once Estha finally gets around to explaining slightly more facts about it. The parts he has explained are not recognizable tropes to Merrin but, like, if someone did write a setting like that for some reason it would absolutely be in the Ill-Advised Goods store because it's super upsetting, and Merrin would not have incidentally come across it...
"- and sometimes if a set of characters are very popular, the same or a different author will sometimes take the people from one story, and write an alternate version where their whole lives took place in a completely different setting. If it's a very different setting there are sometimes pretty big divergences, but they're still in some sense the same characters, and at least one of the common trope-versions has them having recognizably similar relationships with other characters..."
Huh, Merrin thinks the headband is somehow directly making her better at explaining in a way that feels generalized - she's not bad at it, it's relevant to her work, but it feels like if she had to get up in front of a crowd of bystanders in an Exception Handling emergency sim and direct them, she would be better at that, too...
Merrin's enhanced Wisdom is also pointing out that she has not, yet, explicitly informed Estha in so many words that Hell and Asmodeus and the whole being-Evil-on-purpose thing and frankly nearly everything she knows about his world is horrifying according to her values, which she does not at this point anticipate changing in response to external pressure. Maybe when she was eight! You could corner a Merrin into an awful lot of things when she was eight! But whatever the exact mechanism and history, Merrin-as-she-is-now experienced growing up in dath ilan, and the adult Merrin at the end of that is just - no.
She's not, yet, sure if or how she can find the courage in herself to be a protagonist about it, rather than just being quietly grateful that she's stuck indefinitely on this rock in space where she cannot affect anything in Golarion so it cannot possibly be her problem. But she's not going to actively work for the god of torturing people who don't want to be tortured! Because that's bad! It's not complicated!
(Her enhanced Wisdom points out that they might, in fact, still get scooped up by Estha's executive, which Merrin now thinks would be EXTREMELY BAD FOR EVERYTHING THAT MATTERS TO HER. There's also not a huge amount she can do to affect it, aside from...tropes stuff, maybe...which she's trying to address by brainstorming with a second person even if that person is EVIL.)
...It's inevitably going to come up at some point, Merrin concludes, she can't hide indefinitely that she's horrified about it, but it's going to introduce complications and he might get really mad and they have limited time on the Baseline-translation spell, which he might not get another of, so it makes sense to prioritize explaining high-context stuff where Baseline has much better vocabulary.