By that point, he's so drunk on (SPOILER)Sin's power that he doesn't need Anima. Of course, Anima's Fayth explains this to the party when they meet her.
I believe that the Aeons represent the true essence of the Fayth. Anima has a truly frightening soul then, twisted and bound by fate.
Ultimately though, I felt sorry for her. She can find no happiness, just release.
