When was that confirmed? I was under the impression, that we either assumed Xemnas was the holder of Terra's heart, or that some of Terra's memories leaked into Xemnas which is why he called Aqua's armor "friend".
It wasn't confirmed.
The only things we know for sure are that Xemnas had mixed memories of both Master Xehanort and Terra and that he was apparently obsessed with finding the Chamber of Waking in Castle Oblivion and finding Ventus.
Why he had that obsession is not yet clear, it can be influenced by several things.
Xemnas was also obsessed with memories and wanted all memories of his former lives, so that could be one possibility, another one could be subtle influence by Xehanort (X-blade, Ven also was MX's pupil first and he saw him as an integral tool for his master plan) or even some subtle influence from Terra.
We simply don't know the reasons yet, as well as we don't know if Xemnas's goals regarding the chamber and its secrets were malevolent or benevolent in nature.
When was it specifically stated that Xehanort's looking for his body? I know it's been implied but I think we're just making assumptions. We are a smart bunch though so they're often times right.
It wasn't specifically stated that Xemnas looks for Ven's
body in particular. It was only stated that Xemnas was obsessed with finding the chamber and that he and Xigbar knew what's inside it.
Reasons for that have not been unveiled yet.
Well, Xemnas sent a group of Org. XIII members to Castle Oblivion for more than one reason. One of those reasons was to find Ven's location.
The main reasons Xemnas sent a group of members to Castle Oblivion were to experiment with memories and also with Sora, giving order to lure him to the castle for whatever reason.
Marluxia then took the whole thing too far and tried to make Sora his puppet.
The last main reason was to weed out the traitors Xemnas had already suspected.
The search for th Chamber of Waking was kept a secret, only Xemnas, Xigbar, Saix and Axel knew of it. Axel was the one member that was sent more than one time to Castle Oblivion by Xemnas's urging to find the chamber. That was also the reason he remained longer in C.O. after Chain of Memories and just came back several Days later, he was searching the Castle on Xemnas's orders for the chamber.
It was said in Days-dialogue that Saix was also very interested in securing the chamber, but for his own goals and not for Xemnas:
358/2 Days said:
Saïx: The castle hasn't given up all its secrets. And there's one in particular Lord Xemnas is especially interested in.
Axel: You mean the chamber. We turned that place inside out. If it's there, we're not gonna find it by just looking.
Saïx: Hmm... Then let me give you another incentive. Naminé isn't the only one who can trace her beginnings to Castle Oblivion. Xion comes from there, too.
Axel: Huh?
Saïx: Two of your favorite people. Still think another visit is a waste of time?
Axel: Hmph... Whatever. You're the one who wants me to go. Don't try and dress it up as a favor.
Saïx: Hmph.
Axel: Let me guess... That chamber will tell you everything you don't know about Xemnas's true agenda. Is that the idea?
Saïx: The Chamber of Repose, and it's antipode, the Chamber of Waking... Xemnas isn't telling us something. And the missing chamber, the Chamber of Waking--it holds all the answers. We need those answers to gain the upper hand--for our own reasons.
Mhm. I always thought of that more as part of Xemnas' motivation than Xehanort's. It would also be the same part of him that was talking to Aqua's armor
It's way too early to say which of all this was Xemnas's own, which was Xehanort's, which maybe Terra's or which even possibly Eraqus's motivation.
For that we know not enough about Xemnas's true composition.
Heck, we don't even know for
what he wanted to find the chamber so badly.
I made this theory a while back about how Ven's heart was asleep inside his body, reason being that some form of his heart flew away during his Awakening. Whatever form that was, it made it into Sora.
Xemnas could be looking for either the Chamber of Waking or Ven's body. Or, both.
That was more of a metaphysical and symbolic scene though. While I do think that Ven's injured heart struggled on for a while after that and was still "there", but so badly wounded not even Yen Sid could sense it anymore (evidenced by Ven still being able to summon his keyblade to open the way to Land of Departure when carried by Aqua and by the fact that when Sora reached out to him he was already in the Chamber), it left later.
After Sora had called for him his heart finally left and followed their connection into Sora's heart, knowing it would not be able to struggle on much longer.
("But now, I need to go back to sleep.") This or something similar was said by the wounded heart when Sora held it in his hands, giving the above some credibility.
I'm assuming both, as Xigbar clearly hinted at the "other friend" in his typical troll talk to Zexion.
Ven is in that chamber, as said by Xigbar.
Correct.
How exactly would Xemnas have known that? I'm not questioning that he does, because it's clear he's looking for the Chamber of Waking... but the only person that should have known about Ven being in Castle Oblivion should have been Aqua
In fact, the only other people that should know Ven's even in a comatose state are Yen Sid and Mickey
Did Xemnas just make an educated guess?
About the chamber it would be easily explainable if Xemnas also had some memories of Eraqus. After all, he told Aqua about that mechanism.
Furthermore, who knows what knowledge Xemnas gained in all his sessions in the Chamber of Repose?
Heck, maybe Xemnas even has Terra's wayfinder, granting him a magical connection to Aqua.
If you remember KH 2 Xemnas is an excellent actor, so he would be more than capable of impersonating "Terra", especially if he had some of his memories, which is confirmed.
Well, remember, Xemnas talks to Aqua's armor from time to time, and Xigbar could have sworn that one time he heard the armor talk back.
Either this, or Xemnas somehow gained knowledge from that chamber in another way.
I meant we don't know what he's interested in.
Exactly, we only know
what Xemnas was obsessed about, not
why he was.
