Ven is a actually a replica of roxas. But the Ven escaped and jump to Realm of time. Warp back 10-11 years. Then he saved Terra.
Proof1: Ven asked Aqua to "erase" him.
Proof2: There is some connection between Realm of time and Aqua armor.
Proof3: 358/2 days Xigbar sees Xion as Ven. But Xion is a replica of Sora and Roxas is his nobody.
Proof4: During the BBS trailer 2009 . Even(Vexen) said I think i may have some connection to you in the future
Proof5:Ven become a apprentice AFTER Aqua and terra(stated by nomura)
Proof1: Ven asked Aqua to "erase" him.
Proof2: There is some connection between Realm of time and Aqua armor.
Proof3: 358/2 days Xigbar sees Xion as Ven. But Xion is a replica of Sora and Roxas is his nobody.
Proof4: During the BBS trailer 2009 . Even(Vexen) said I think i may have some connection to you in the future
Proof5:Ven become a apprentice AFTER Aqua and terra(stated by nomura)