Killer Ventus
(Keep in mind I haven’t seen the latest update to the KHUx story) So I keep seeing posts about traitor/killer Ventus theories and now I’m getting obsessed with it because, if you think about it,
Ven being the killer in KHUx would actually make sense because
1. He doesn’t remember anything before hit heart was split. So he wouldn’t remember being a killer
2. It’d explain why he was with Xehanort before his heart was split
3. It’d explain how Vanitas exists, how Vanitas has so much darkness, and how Vanitas was perfectly fine when he first appeared but Ven was completely broken
4. It’d explain why Xehanort thought Ven had enough darkness to become pure darkness. (In the scene where we find out how Vanitas came to be, Xehanort was telling Ventus to give in to the darkness. It seems to me like he was trying to get Ven to be his pure darkness, and he’d use a princess of heart or something like that for the pure light)
It would also partly explain why he was so quiet in KHUx. Maybe it wasn’t just shyness. Maybe he was saying as little as possible so that he doesn’t accidentally reveal anything.
And I’ve just always found it odd that Ven was just completely dead inside after his heart was fractured, but Vanitas was perfectly fine. Vanitas has always been stronger up until they fought at the end of BBS. It doesn’t make much sense to me unless Ven had a lot of darkness, causing Vanitas to take a large portion of his heart. And Ven being the killer would certainly show enough darkness for Vanitas’ strength to make sense