Vanitas is , at least for me , the most confusing character in kingdom hearts because what the fuck is up with him. Every point made has a counter to it
He's just pure darkness, but the fact he can feel everything that Ventus felt and Ven's own heart fracturing and how the final fight in BBS goes, we also have proof that Ventus is involved in Vanitas.
He chose to be a villian, but did he really have a choice. Both Dark road and Character files have confirmed some aspects of the novel backstory. (Also Kingdom hearts has a series of misconceptions usually brought on by the adults. Yen sid and Ansem about Nobodies. Odin about Baldr. Who's to say Xehanort is also not mistaken.)
There is so much more. Why are there two Vanitas chess pieces? Who the darkness inside Ventus really was during Re:Mind? ( I personally don't think that's Vanitas. I don't see a lot of design motifs matching.). The novels implying he has Ven's Ux memories.
But the best is..
Where even is Vanitas right now? Ansem the wise has implied that Sora's darkness can trap hearts in it. But then what's in Ventus? Why does his Character story use emptiness as a place beyond light and dark?
So much to think.
