Felix

"You look good, immortality suits you."

Felix is one of the guards of the Volturi. His motivation is not at all described in the books. The only cues to discern his character are what he is described to do physically, and how he speaks to Bella and Edward.

Physical description
Bella describes him as "very big, tall, and thick", and that his size reminds her of Emmett Cullen. He is described as having an olive complexion which looks odd combined with his chalky skin. He also has short, cropped, black hair. He is not gifted, unlike most of the Volturi. It is assumed that he is kept in the guard because of his immense strength. He also is thought to be a fighter.

Portrayal
Daniel Cudmore, from X-Men: The Last Stand, plays Felix in New Moon film. In the film, he appears talking to Alice in the hallway when Jane arrives.