Binah: Then I must ask, why is that the grand and righteous upholder [of justice] standing here making himself out as a prisoner like I? And what happened with that coward? The one who with fear averted his gaze from my dying one? Why is he down here, suffering the same punishment as I?
I went looking for something else, but had to grab at this, because it reminds me SO much of this one thing I keep saying about Dante.
Because isn't it funny, how in all official materials, there are "twelve Sinners" - the Sinners who fight, who die, who get brought back as the clock turns - and yet there is also a number on Dante's coat.
"Why [are you] standing here, making [yourself] out as a prisoner like I?"
It's incredibly relevant that in almost all other languages, the name of the Sinners as a group is actually "Prisoners," or "Inmates."
This, in fact, makes sense considering how they're treated during the Regular Check-Up - as people without rights, who live at the behest of the Company they work for.
Dante, the Manager, is a Sinner (read: Prisoner) just like the others they work alongside and manage.
Ayin, the Manager, is an Inmate of the Facility, having imprisoned himself alongside the Sephirot into the Facility.
Interestingly, the closest Ruina gets to this "running theme" is that Roland is both someone who is above the other Librarians, is Angela's direct subordinate, and yet is also following her commands just like they have to. Roland's case is more forced, however, as it doesn't match up perfectly the way Dante and Ayin do.
Just like how Angela's position as the Pale Librarian is foreshadowed in the White Ordeals, Dante's position as "Manager and Sinner" is foreshadowed by what Binah says to Ayin.
If it's revealed that Dante IS Ayin, this also adds extra depth and context as to WHY they're in this position. After all, no matter what Ayin was able to achieve, he would still have been aware that he had much to make up for.
Binah: It's an agonising sight to confront, but it doesn't matter to you, not at all. Or am I wrong? After all, erasing your memories and running away from them as if nothing had happened is your age-old specialty.
Dante: Dammit... Why... am I...! ...Why am I being attacked? Not good... Memories are dissolving already... The [***] was done too quick...
So, uh, here's ANOTHER thing that ties Binah's observations of Ayin (and she's been watching him the entire time, watching all through the loops) with Dante as a person.
Binah says that erasing his memories is one of Ayin's "specialties," while one of the very first things we see from Dante in their narration is that they knew that they'd lose their memories by attaching their clock head. It was knowingly done, on purpose, with the only issue being that not enough time was spent on it.