Everything we know about the past of Roxas/Riku/Ansem/Namine SO Far...

When Sora became a heartless, Roxas was created

How he joined the Organization in the first place is still a little unclear, and might be made clear in 258/2 days

He joined the organization, but wanted to know why the keyblade chose him

Meanwhile, Riku was with Ansem the Wise.

Ansem sent Riku to get Roxas. Riku defeated him, and brought him into Twilight Town, out of the Organization's Hands

The organization kept trying to get into Twilight Town to get Roxas back (ex, ansem's line "We would be giving the enemy another entry point")

Namine was also working with Ansem, (ex. ansem's line "Namine, hurry!") to probably help restore Sora's heart. The reason why Sora's heart needs to be restored is still a little unclear and might need some clarification. Kingdom Hearts Coded seems like it might have something to do with this

Ansem wanted Sora, and not Roxas. Reasons for this might involve his own interests and Riku's, since they're almost family and all (ex. ansem's line, "Can you feel Sora?")

Eventually, Roxas defeated Axel, and went on to see Ansem, who was waiting for him. At this point, what happens right then is still unclear. It could be that Roxas is ''absorbed'' into Sora, but it never describes what EXACTLY Happened. This needs clarification

For some reason, Roxas was able to fight Sora at TWNTW. This could have been the darkness in Sora's heart and TWNTW releasing Roxas from Sora (ex. Roxas' line, "Someone from the Dark.")

At the end, it hints that Namine is Kairi's nobody in the ending cutscenes.

Overall, we know a lot about Roxas, just not everything, Comments?