User blog comment:Mr. Mittens/Mystery Screenshot from Comic Con Identified?/@comment-2127131-20121003202319

Ok the ship is human in design, no doubt about that, and since it's in red I would suggest Cerberus. And near the bottom right of the picture we can see the Cerberus logo. So that is supporting the Cerberus ship idea

As for the person standing behind Shepard, I Haven't got a clue who or what that person is. But from the height and structure of the person, I would highly suggest that the person is turian; that or a khajiit for some odd reason.