Well, really, the only big thing you need to know is that pretty much every defense-helper-girlie is actually a Reyvateil.
The Feys and their channeling? Actually does through a hymn that lets them access other Reyvateil's Cosmospheres (though I really hope this wouldn't screw something up system-wise).
Like, it's pretty much read-only access, which makes it a bit different from the series' actual channeling. Of course, humans can't be channeled because no cosmosphere.
And I'm pretty sure that it's something to do with their Hymn Codes that give them this special permission or something. Bleah.
So. Mia, Maya, Pearl? All Beta-type Reyvateils in the same lineage (they'd need to be to sing the channeling hymn).
Next in chronological order is Trucy, who's pretty much the only Third Generation Reyvateil of said Defense Helper Girlies.
Which brings me to something I was just enlightened about that makes me giddy with twisted glee: THALASSA GRAMARYE AS A BETA-TYPE REYVATEIL.
THAT WAS NO GAVINNER CONCERT; SHE WAS SINGING SONG MAGIC AND NEARLY BLEW UP THE STAGE!
...If I was shoving the AA-AT-AU into Tyria's tower I could then suggest that Apollo is a Medley but since I'm not that's not a concern. =3=
Now! For the one who spurred the fusion for me: Athena. Athena is another Beta-type Reyvateil.
The Mood Matrix is actually accessed through a hymn that only Athena can use.
By the way, I should mention the twisted implications of Athena being a Beta-type because I'm a slippery bastard: she was made in a tank. Metis wouldn't be her actual mother in this AU.
...Yeah, that's pretty much everyone's reaction to Ar Tonelico. =7=
If I were feeling particularly generous I could make Metis another Beta Reyvateil in the lineage but I'd rather she just be another researcher who adopted this new Beta "model" as her own daughter.
im sort of skipping oveer things because my brain right now
Yes, Ar Tonelico will do this to you. The people who made the science and mechanics of the game's universe are either brilliant, insane, sadistic, or all of the above. (DON'T LOOK UP WAVE THEORY!)
I think that's actually all of the ones I had to address for now aside from blah blah blah Phoenix Apollo and Blackquill are all Vanguards/plain ol' humans.
lol its not really because of Ar Tonelico though
my own concentration right now
Puu. Go nap and then come back so I may indoctrinate you into my slow step into insanity. -punted- (But really, I doubt the AT jargon will be that much easier to understand even with a clear head. XwX)
...If I had time and wasn't trying to write like 15 songs at once I'd totally start writing the Channeling/Mood Matrix hymns now
Meanwhile, two problems have sprung up. How would Psyche-Locks work in this AU, and how what would Widget's purpose be if the Mood Matrix's functions have been moved to a hymn?
I'm guessing Psyche-Locks could be activated through a Hymmnos Spell that acts as a shortcut to a hymn sealed in a magatama or something...