Don't think anybody knew what she was capable of then. I know it definitely came as a shock to the Organization; they kinda beat it out of there in a hurry til things settled down a bit, then only snuck back in sometimes to use the equipment in the castle basement; that part of the castle got sealed off during Malificent's takeover, so I don't think she ever even realized it was there. Besides, I don't think a sorceress would have much use for computers and lab equipment anyway.

Well, that and... Xemnas would go there alone sometimes, and go into another, smaller hidden room there; it was usually locked tight, and nobody else knew how to open it. A couple times people followed him, and lurked around outside the door, and it sounded like he was talking to somebody he called a friend, even though we were all sure there wasn't anybody else in the room. Was kinda creepy, to be honest. I mean, I wouldn't be surprised if Xemnas was a little crazy, but still...

[The description of Terra doesn't really ring a bell. Aqua's however, stirs a faint memory...]

Hmmm... Did Aqua have short hair and an outfit that included armored boots, a black corset, and detached sleeves?