What you guys have not introduced is from the ansem reports, namine and roxas are special nobodies considering they were created from special hearts because kairi's heart which sora had, had no darkeness within it, and kairi who is one of the seven princesses of light also had no darkness when she lost her heart, also if roxas did not have emotions, explain the whole scene at the end of the tutoral where roxas is really depressed after his "summer vacation is over"
We've mentioned the Ansem Reports a few time, I believe. And the fact that those two are Special Nobodies. But the thing is, Roxas himself isn't that special of a Nobody, considering his birth was the same as a normal Nobody's birth would have been. The only thing special about him is 1) He has no memories, 2) He wields a Keyblade despite that being only a weapon a strong heart should be able to wield, and 3) He's the Nobody of the Keyblade Wielder. He was still born the same way a regular Nobody should have been and is still made up of the same components as a regular Nobody is, that is a body and a soul. In theory, he should not have a heart, but when considering he has 'emotions', that's what everyone is debating right now.
Now, why I say Roxas doesn't have a heart is because, well, for one, he's a Nobody and in theory is supposed to lack a heart, otherwise he'd be whole. Not a particularly strong point, I suppose, considering I know someone is going to shout, "But he's a special Nobody!!!".
But, moving on, my second point of why Roxas doesn't have a heart is because Nobodies have been known to fake emotions to pretend they have a heart and thus 'feel' whole. Who's to say that Roxas didn't observe the other members and citizens of the worlds he traveled to and learned to fake emotions like his fellow members did? Nothing, except well, maybe Days. Not only that, but LiLo has a theory about emotions leaving an imprint on the soul as they separate (I might have gotten that part wrong), but basically, there's an imprint of emotions on the soul that would allow them -Nobodies- to feel to an extent, but not have full-on emotions. I'm kinda iffy on this, but if that were the case, I suppose that would explain why certain Nobodies were able to go above and beyond with their 'faking' of emotions, because they have that imprint left behind on their soul.
I just butchered up that theory, now didn't I?
And, lastly, Roxas is a Special Nobody, which means that the circumstances under which he was born were 'special' or out of the ordinary. Now, although I have already mentioned that Roxas isn't that Special of a Nobody, he still is a Special Nobody, having been born from one of the strongest hearts in the series. Now, considering who his Heart or Other is, isn't it possible that his connection to Sora is stronger than the average Nobody? Maybe along with the memory leaking out of Sora, the emotions connected to those memories were leaked into Roxas. We know or we assume that Xion has been absorbing those memories, but what about the emotions? Couldn't Roxas have functioned as a filter of sorts, all the memories seeping through him into Xion, but the emotions being collected inside? This last one is really out there, I suppose, but it's just something I've been thinking.
Though it's plausibility is most likely none and I'll prolly get flamed for this, I just thought I'd mention this.