I think it's xemnas cause he was the first of the nobodies and has special power and xigbar can't do the stuff that xemnas can do so it must be xemnas cause he was the 1 who fought the other keybladers back then and captured 1 of them and the reason why he calls the knight his friend is because it's been awile since he last seen him and also the reason why xigbar say's "you aren't even half as strong the others were"at least i think thats what he said any way he captured 1 of the knight and all or some of the organization members went 2 see him so it must be xemnas cause when it show the cutscene were micky and ansem the wise were talking he wanted to try out an experiment so by that time they already had the lab were xemnas goes to see the knight. So i say by the time sora was sleeping he had already fought with the knights and taken 1 of them thats sound right .:thumbsup: