I believe Moose refered to it as "Schrodinger's Emmerololth", and has her with a big ol' "WTF" on his spreadsheet. Basically from what we know of her she's dead. Like, really dead, "Galuf and friends scattered her essence in such a way that she shouldn't be able to reform" dead. But we DO see her in ARR, which may have been an oversight, or maybe someone else got raised to the seat of Emmerololth and the one in Eureka's backstory was the previous one.

If it WAS an oversight, at that point they should've just used Deudalaphon, who hasn't been mentioned, or Halmarut, who's only mentioned in Akademia Anyder. If there's a new Deudalaphon... guess that actually leaves us with 5 Ascians for (likely) 5 dungeons between 81 and 89 (plus the lvl 90 dungeon), but it feels like a very important plot point to not have been picked up again.