Karl Marsten was the son of the late Josef Marsten. Born a Werewolf and brought up as a Mutt. He has followed in his father's footsteps and became a professional thief. He was dating Hope Adams, though he proposed to her in the short story "Lucifer's Daughter" and who he has one daughter Nita Marsten with. He is featured heavily in Personal Demon and Living With The Dead. He taught Hope the basics of breaking and entering. He also recently joined the Pack, although not as a major member like Elena Michaels or Clayton Danvers.