As far as I know, they've only shown the biography creator. Character appearances are premade, and the full creator won't be around till the full version.
What little of the creator they've shown in the demo seems to be an abridged version. Both good and bad -- I'm about to die to see the whole thing, but looking forward to discovering it when the game actually comes out.
But I knew this. Still excited. CAN'T WAIT MAN. CAN'T WAIT. Gonna go buy a tent right now cause I'm camping outside Gamestop for the next half-year or so.