When did Xehanort become a Heartless?

Is Ansem or Xehanort a Heartless?

Technically neither. Xehanort became a Heartless, and that Heartless called himself "Ansem."

Why did Braig Dilan Even Aeleus and Ienzo become Heartless?

Xehanort determined that in order to become more powerful, he had to turn himself into a Heartless. Braig and the others were either researching with Xehanort or were guarding the labs that the others were working in. Therefore, when they heard what Xehanort had discovered, they wanted to be a part of it. They, in turn, became Heartless, and their Nobody incarnations came into existence.

How much did Riku-Ansem look like Xehanort's Heartless?

Riku-Ansem is identical to Ansem, which is the Heartless of Xehanort.

Did Xehanort's Heartless look like Xehanort?

The one we know of as "Ansem" is Xehanort's Heartless. He shares some characteristics, such as obvious similarities in clothes, but is very different in appearance.

How can the destruction of Xehanort's Heartless and Nobody allow the reconstruction of Xehanort himself?

Xehanort's heart was once destroyed by Heartless but is now free, and his Nobody has been destroyed. Now both halves shall return to the whole, which means Master Xehanort shall return.

Did Xehanort's Heartless look exactly like Ansem the Wise?

No. Xehanort's Heartless (the fake Ansem) looked like Ansem the Wise (the real Ansem) but a lot tanner.

How did Riku turn into the Xehanort in heartless from?

Because when Riku went into the Door to Darkness, the darkness consumed him, so he could use the powers of the dark, look like Xehanort when he was a heartless, and a darkness keyblade.

How does Xehanort die?

Xehanort (currently in any form) doesn't die. Apprentice Xehanort, however, gave his heart into Darkness while researching the mysteries of the heart and heartless.

Why will Xehanort's two halves return whole after they've been destroyed?

When a Heartless is defeated by a Keyblade, its heart is returned to the person it belongs to, so Xehanort's heart will return to Xehanort.

Was the Ansem controlling Riku actually Xehanort?

SpoilersXehanort had turned into a Heartless that called himself Ansem and controlled Riku. So technically, yes, it was Xehanort, but then no, it was his Heartless. The point is, the real Ansem was a good guy, not the one controlling Riku.

Will Terra get his body back from Xehanort?

Terra-Xehanort no longer exists. After the tragedy by the heartless attack Xehanort (Terra-Xehanort) became a heartless (Ansem the Seeker of Darkness), and created a nobody as well. This could be explained if Xehanort offered himself to become part of the experimental guinea pig, at the time they were attempting to become darkness in order to gain power. They used their artificial heartless technology as part as their experiment, which is why you see the "artificial symbol" on "Ansem the seeker of darkness", in hopes of controlling them, and could explain why only Xehanort's heartless stayed in a humanoid form possessing immense power and self consciousness. Xehanort, at the time of the experiment, still did not recover all his memories, but did happen to summon the keyblade. This can be proved since both Xehanort's nobody and "Seeker of darkness" both refer themselves as "Ansem" and have no prior memory of their real past. Remember that Terra-Xehanort have become one heart, battling each other, thus the heart succumbed to a coma like state, forgetting all memories from the past and becoming an entirely new person. But since Xehanort was able to summon his keyblade he does in fact have the ability to gain his memories back, when this happens the battle of the two-hearts-in-one will begin again, eventually. Only a keyblade wielder, like Sora, is able to unlock their hearts and put them in their right places. 3D drop distance will answer these questions and most likely Sora will have to defeat "Ansem the seeker of Darkness" and "Master Xehanort" (the original) as well. This story plot is highly likely since the trailer states Sora to "restore them in their proper places." The question is, how does "Ansem The seeker of Darkness" revert from being a heartless to a human again? Since heartless' are just manifested hearts. If the heartless were to be destroyed, it would end up in Kingdom Hearts. Sora most likely has to do something about Kingdom Hearts and the hearts that are trapped in them.

How are Ansem Xehanort and Xemnas different?

SPOILERSAnsem is a scientist who's later known as DiZ. The real Ansem never became a Heartless. Xehanort is Ansem's apprentice and first experiment. Xehanort later named himself Ansem when Xehanort became a Heartless.Xemnas is Ansem's Nobody.So there are two Ansem's (the imposter Xehanort and the real one named DiZ).DiZ uses Darkness, while Xemnas uses Nothingness.Ansem (Xehanort) and Xemnas are two halves of Xehanort.