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I'm not sure how long they've known each other, I'm sure Terra and Aqua knew each other longer than Ven though. It's possible that Terra and Aqua arrived together or something.  Timelinesplitter Chaos 02:12, December 19, 2012 (UTC)

I gave a look at the wiki. It says that Ven was brought at the land of departure 4 years before the game. Square was sure lazy with models: they look exactly the same, which make it even harder to tell their ages. AkaAxl 16:43, December 19, 2012 (UTC)