Yeah it's true I got this info from ign.com. Squaresoft showing 3 more characters, this is the details;
This is the guy with the spikey blond hair who looks somewhat like Final Fantasy X's Wakka.
Lebro is the character with the impossibly low cut shirt that you'd never wear for a battle unless you were trying to win by distracting your enemies. She's the only female member of the team and is said to be strong-willed, but kind.
Ths is the guy with short blond hair, goggles, and what appears to be a Chicago Cubs jacket. Yes, it's a "he." Markie is somewhat timid, but is said to be a fine member of Nora.
But unfortunately that names not for official Final Fantasy XIII game, commonly Japanese version different with international version. Read more detail about them on http://ps3.ign.com/articles/954/954672p1.html.