I'm actually starting to believe that Roxas=Ven, Namine= Aqua, and Xion=Sora/Kairi mix.....Doesn't make much sense, but what really makes sense in the KH universe at the moment anyway?
kh: Awh, no one...I loved all the characters, they were portrayed nicely... ^__^...Kairi was a bit of a Mary-Sue, though.
CoM: Axel. UGH! He killed Zexion for no reason other than to save his own butt from getting told on to Xemnas!!
KHII: Kairi and Ansem the Wise / Yen Sid. Kairi was an annoying Mary-Sue in this one as well. Ansem and Yen Sid were both racist towards nobodies, and just overall way too arrogant to earn my respect.
Well, since I played Chain Of Memories, and saw the KHII trailer...I knew that her and Namine were connected to Sora and Kairi in some way. I originally thought that they were Opposites of some sort, living in a opposite world. I thought Twilight Town was Opposite Traverse Town, and that the Twilight Thorn was Opposite Darkside. I wasn't too far off, right? XD
Xemnas- Black or White...or checkered
Xigbar- Purple
Xaldin- Green
Vexen- Icy Blue XD
Lexaeus- Brown
Zexion- Deep Purple/Blue
Saix- Dark Blue
Axel- Red
Demyx- Blue/Aqua
Luxord- Lemon Yellow
Larxene- Light Yellow
Marluxia- Pink
Roxas- Orange
As everybody else said...Axel was just saving himself from the Superior's wrath. Xemnas would've flipped if he knew Axel killed off a senior member (Vexen). Zexion knew, was probably going to tell, and Axel knew that he knew because Vexen was in Zexion's little posy. Lucky for Axel that Riku took care of Lexaeus, because I don't think Axel or Repliku could've taken them both. I think that Lexaeus and Zexion would make the perfect team, perfect combination of brain and brawn. =D
Maybe...Ven died and reincarnated as Sora's other? It's a stretch, but we know Ven and Terra were on Destiny Island watching Riku and Sora fight when they were 4/5, so Ven couldn't have that much of a connection to Sora, because he was alive at the time. However, if something were to happen, like Ven being frozen...and Aqua having no magic to save him other than maybe a soul-transfer thing, some random turns of events could lead him to Sora's body. Think of Kairi, only more complicated. But again, I'm probably looking too much into this XD Ven's probably Sora's cousin.....-Sarcasm...until Nomura sees this thread and proves it true next week, being the cruel man that he is.-