User blog comment:Commdor/Omega DLC Plot Elements Leaked/@comment-24174486-20121107031110

Here's an image of the female turian ally, Nyreen, and a screenshot of Nyreen's squad screen. The screenshot is in French, but her powers seem to be Incinerate, Overload, Barrier, and Lift Grenade. You can also see that Aria fills the other squadmate slot.

Given the lack of unique bonus powers, I doubt Nyreen will become a permanent squadmate. A shame; I would have liked having another Sentinel, especially in the rare few playthroughs when I don't save Kaidan.