the flashbacks could also be artistic license, as the dyrl movie would have been more well known circa 2067, what was interesting was him namedropping that the ancient pc song(dyrl) was actually used in the final battle. i imagine what actually happened to be an amalgam of what we saw in SDFtv and DYRL, but with the dyrl design aesthetic taking precedence. also i liked how they brought up the sharon apple incident in more detail, something 7 and plus really didnt touch too much on other than a small reference or two. My gut feeling despite Berger saying that lady M was someone who has been researching song tech since space war I, is that lady M is myung. Im sure she had a lot of input on how sharon was designed along with the effects sharon had on people were somewhat similar to the mind control from songs displayed in delta var aside. Myung also seemed to be more comfortable in a producer kind of position than singing in the foreground. i Imagine she likely got some hush money from spacy post sharon apple incident and used that to start up Xaos. My second bet is, i highly doubt mikumo is an android, im betting she's an actual protoculture, her flashbacks would seem to support that theory. also wouldn't be surprised if the legendary "Starsingers" are merely Anima Spiritia and that windemerian's wind singers are a less potent diet Anima Spiritia.