So i got all the Ar Tonelico Soundtracks in the mail and going though them i can ID the Songs that are downloaded into Aurica, Misha and Shurelia as they all have the prefix EXEC_ (ie. EXEC_CHRONICLE_KEY is the song Misha sings to seal Mir, EXEC_SUSPEND is what Shurelia uses to shut down Ar Tonelico and EXEC_RE_NATION is the song sang to restart it)
I got the soundtracks so i could listen to the boss music for when one fights ELMA_DS at the SPU and i found the track in the Soundtrack Singing the Stars ~Hoshiyomi~ Ar Tonelico Hymmnos concert Side Ao and it has EXEC_CHRONICLE_KEY and EXEC_HARMONIUS but the song i was looking for is titled EXEC_PAJA/.#Misya extracting
From the looks of the track name it seems like it's supposed to be Song Magic but if it is Song Magic who's it is and what does it do? because i don't remember there being a mention of a Song/Hymn Crystal called Paja.