The chamber of repose supposedly conducted by ansem's apprentices after banishing him and becoming nobodies we know contains aqua. But the chamber of awakening supposedly contains Ven. This room is supposedly in castle oblivion and thats partially why xemnas was having axel execute actions there to find his other "friend." But based on certain facts xemnas never found this other room. However i think this room has links to that of the room namine used to restore sora's memories after the events of com.Even in kh2 after examining some of the other sleeping pods it is said this has been used before but for other purposes unknown whether this relates to anything or not im not sure,but In my opinion i think atw knows about this all along which is why he does his studies there and such, but it's just a theory. I just wanna hear some opinions on this or any other facts/theories that my clear this up or watever.