I guarantee we'll learn more about Aria when Oomori finally decides to give Ais her arc.

We might just have a few drop of info about ais with the dagger from the guild and the new floor but until ais arc nothing until many years.

I would like to see Aria alive but is a hopeless endeavor because that would Ais so happy.

She might not be dead but hangging until she see her daughter anyway what i'm truly interested in is in what kind of space-time zone Aira, Ais and Albert where and how Albert party knew how to reached it and if they are alived since there status is still unknow. I mean technically Ais is a grandma from all info we were given in the battle between Albert and the OEBD

PS:i forgot but at their time gods had yet to descend right?