Marcus is one of the three leaders the Volturi coven. He possesses the gift of relationship identification, allowing him to see the emotional ties between individuals. He was the husband of Didyme until her death. The loss of his wife forced him into a withdrawn, introverted state. He is only kept in the coven by Chelsea's power over his loyalty. In Life and Death: Twilight Reimagined, Marcus controls the Volturi with Athenodora and Sulpicia instead of Aro and Caius. He is portrayed by Christopher Heyerdahl in the movie adaptations.