The new issue of Gemaga magazine is coming out on the 30th January in Japan and it has even more details on Final Fantasy XIII and Versus. Nomura is also going to comment in the article too.

Some details on the Versus characters from the article have been revealed early.

The symbols which appear behind the protagonist and girl (seen here) are supposed to be involved in the battle system as well as the plot of the game.
The relationship between the main character and the girl has something to do with the Shakespeare quote shown in the E3 2006 trailer ("There is nothing either good or bad, but thinking makes it so.")

Thanks to BlankChocobo for the translation

Source: Apocalypse Blog (via FF&KH Blog)