Dragon Age 2 - Anders Revealed as a Companion

A forumite, Shepard N7, on the Bioware forums made this thread about one of the characters in Dragon Age - it is: Anders, the Mage. In the thread there is a link to GameInformer's website on which there is a gameplay video featuring this reveal. Here's a snip from the text:

New protagonist Hawke first encounters the mage in the slums of the city of Kirkwall, where Anders has taken up a life of healing refugees from the Blight. Hawke needs the former Grey Warden's help, and Anders is willing to oblige in return for a favor.

On this first quest with the new companion, Hawke uncovers some surprising twists about Anders and his new life. What secrets is the apostate hiding? Why are his eyes glowing eerily in the screenshot above? What other surprises await in Dragon Age II?