User blog comment:Nitrous X/Theories/@comment-1206717-20091101204150

The Lingering Sentiment was probably a being similar to the Absent Silhouettes; the Weapon of someone which has taken it's owner's form and abilities.

Anyway, here are my comments on your theories:

1. I don't think that they truly feel, but they can use their memories to imitate the behavior of feeling. Roxas probably did have a Heart, but he never knew, and since he thought he had no feelings, he didn't show them too much.

I also believe that when a Nobody is connected to-friends with a being with a Heart, they gain some sense of feel; like Axel did by being close to Roxas (KHDays and KHII) and Sora (KH:CoM and KHII).

2. I think that this theory is quite good and could well be true. But I don't think that they can do it just anytime, but only is special circumstances.

3. I don't think that's correct. If that were true, then people would just all eventually get back to their old selves... no matter what! that sounds a bit wrong.

I am pretty sure of this; When a person is turned into a Heartless by the means of losing his/her heart to the Darkness (or taken by Pureblood Heartless) they get turned into a Pureblood Heartless and lose their Hearts. They lose their bodies and free will, act on instinct and have no mind of their own.

The Hearts of those guys gather naturally in Kingdom Hearts and float around in eternity.

If your Heart is taken from you by an Emblem Heartless (artificial Heartless) you turn into an Emblem Heartless. The Darkness in your Heart takes over, and therefore, only Emblem Heartless have Hearts within them. So, when they're defeated by someone, the darkness-body is destroyed, but the Heart just goes back into Darkness, and eventually becomes a Heartless again. If a Keyblade wielder defeats the Heartless, the Heart is "captured" and it gathers in nothingness, where it eventually weaves with the other hearts to make Kingdom Hearts.

Anyway, no matter in what way you lose your Heart, only if you had a STONG Heart and will, your body and mind keep on wandering the world. You keep your memories (soul) and and body, but your Heart can only be retrieved by "asking" the complete Kingdom Hearts for it, once you've "earned it".

4. Xion was created using the leaked memories of Sora, and she had them with her all along. When she passed away, she had already spoken to Naminé, who had explained how it would go after she "went away"; Naminé had to "take" Sora's memories along with her own and put them inside Sora. And since she took Xion's memories, it had the same effects as when she put Sora to sleep; everyone who ever knew her forgot about her. Everyone slowly forgot about her, and all the information on her slowly disappeared. Like we Riku's memories of her blurring, bit by bit. In the end he can't even remember her face. Roxas also can't remember her name, and calls Xion "her" when he's talking to Riku, and he replies: "It's a struggle even to remember her name now, isn't it?" (or something like that).

I bet that her memories are still within Sora, but I doubt that her memories will ever return. No one ever mentioned her in KHII and that is most likely due to the fact that she has been completely been swiped out of the memory of everyone - in a week!

Well, that is that :P