All the same it does not fit in any way with his character.Part of Ansem's appeal is he is a good man turned cruel so I wanted to play with that more. Ansem doesn't see her as a fully-fledged person just a tool to get Sora's memories back and to enact revenge on the Organization.
On the contrary, he always tried to get rid of nobody, but here he still creates and in fact "plays God".
As for me after this he would certainly not become an anti hero.
But what about Riku, which in fact is much more useful and stronger than the copy and the hassle with it is much less.
If you improve the days, then clearly not in this way.
But this is my opinion.