Technically neither. Xehanort became a Heartless, and that Heartless called himself "Ansem."
Riku-Ansem is identical to Ansem, which is the Heartless of Xehanort.
No. Xehanort's Heartless (the fake Ansem) looked like Ansem the Wise (the real Ansem) but a lot tanner.
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.
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.
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.
Ansem the Wise is Ansem the Wise, he is nothing else, he pretended to be Diz in Kingdom Hearts 2, and he didn't show in Kingdom Hearts 1, the Ansem you fight in Kingdom Hearts 1 is actually Xehanort's Heartless, Xehanort is Ansem's apprentice, that became a Heartless, and the Nobody of Xehanort is Xemnas. ------------------------------------------------------------------------------------------------- WRONG!!! Xemnas is Ansem's Nobody... Get rid of the x and switch a few letters around and you get ansem's name.... Not xehanort... FYI... ansem was DiZ... AND......... in kingdom hearts you didn't battle Ansem... You didn't battle xemnas... You battled xehanort that was pretending to be ansem... But it turned out that the REAL ansem was just trying to HELP sora... ----------------------------------------------------------------------------------------------------- The first answer was right. Xemnas is Xehanorts nobody. Think about it... they look alike and had somewhat the same goals.
It depends on who "Ansem" is, because there are really 3 different "Ansem"':One is the real Ansem the Wise who disguises himself as DiZ because the other 2 Ansem's take his identity.One fake "Ansem" is Xehanort's Heartless, who calls himself Ansem but is really the antagonist of KH1.The third "Ansem" (the second fake Ansem) is Riku-Ansem: after Riku takes off his black blindfold at Memory's Skyscraper in order to gain enough dark power to defeat Roxas, he permanently turns into Riku-Ansem, who is really Riku but now looks like the other fake Ansem and has more combat power.Since all Nobodies are created from the creation of Heartless, Xemnas is the Nobody of Xehanort's Heartless, Ansem.
In Kingdom Hearts I, Xehanort, Ansem's apprentice, became a Heartless and impersonated Ansem as an antagonist. In KH2, Ansem actually came in person as Mickey's old friend.
Hm, I would say 1. Let's review the four "Ansems": 1.) There's Ansem the Wise, aka Diz, the "original" Ansem. 2.) His heartless is also called Ansem. Heartless Ansem was the only one who claimed to be the original Ansem, so that's why only he is really an imposter. 3.) Ansem's nobody, Xemnas (Ansem remixed + an x), looks almost exactly the same as heartless Ansem, but this one does not claim to be anyone but what he is. 4.) But if you really want to split hairs, you could count Riku as one of the "Ansems" after his appearance was transformed to look exactly like heartless Ansem. He changes back later on. Convuluted, no? :)
Xmnas is Xehanort's nobody and Ansem is Xehanort's heartless. So, basically they are all the same guy. Ansem already tried to take over Riku's hearts so they already have a score to settle with him.
Xehanort
XehanortXehanort is Ansem's apprentice. Ansem told him thst he was going too far with experiments, but Xehanort didn't listen, soon became a Heartless, and called himself Ansem, even though he's still Xehanort. Sora beated him in the first game, but his Nobody, Xemnas, is stronger. Sora beated Xemnas in the second game as well.