Here I was already trying to work out how the Emet-selch thing works. Well, maybe he didn't show up to the meetings because Lahabrea had Source representation covered. Maybe he was too busy pretending to be a bedridden emperor (2.0 - 2.2) or taking a post-victory nap (2.2 ~ 4.0). Maybe the writers just really wanted a Source overlord and bringing Lahabrea back from the dead was worse than a re-frame of the Ascian power structure in every conceivable way.
That kinda seems like small popotoes comparatively. And it's not as easy as swapping in a different name. How would 2.2 (to 2.4, even) Galuf even know the principles behind the act? The speculation about the nature of Ascian immortality was primarily explored in 2.3 and 2.4 as a prelude to Nabriales and the death of Moenbryda, who had yet to even arrive. And that was prompted mostly by the Sahagin elder in 2.2. Moving the timeline to draw out the battle between the Baldesions and Emmeroloth is likewise difficult due to the specificity surrounding the use of the spell.
The very first thing I'd want to see is the actual kanji. It it always, specifically queen? If that's not true, the rest falls apart. I'm also trying to remember if there were any gender mismatches. Igeyorhm and Altima were the only females Scions I remember and Shemhazai and Ultma match. Famfrit's male, right?
EDIT: Looks like Emmeroloth's title is 聖王妃, and 妃 is universally female, as far as I know. Which does seem a tad at odds with:
Or perhaps that's part of the error. All of the Ascians in that scene are copy-pasted black-masks because the true red-masked models hadn't been made yet.
Look at how the overlords don't even have their shoulderpads.
Maybe Emmeroloth was assumed to be male, got the wrong model, and it snowballed?
I'd say let's just not think too hard about it, but speaking for the wider community, good luck with that in the long run.
Anyroad, I'm not sure that the transmigration set can even raise underlings on the Source. Of course, Lahabrea does still have a few of his in the wind. I wonder if Emet-selch has any; we never met any, as far as I know.