Mass Effect characters Mordin and Samara have been confirmed for Mass Effect 3. The reveal came during a presentation of the new game at Microsoft's E3 conference this evening. BioWare used the demo to showcase Kinect support in the upcoming action RPG.
According to the Mass Effect Wiki:
Mordin Solus is a salarian geneticist, professor, and a former operative of the Special Tasks Group, where he performed reconnaissance and participated in the modification of the genophage.
Samara is a nearly thousand-year-old asari justicar, a member of an ancient monastic order following a strict honor code.
Mass Effect 3 is due for release early in 2012.