When Jaxon was seven years old, her father was supposedly killed on a SEAL mission. In actuality, he was murdered by his teammate Tyler Drake, who married her mother only a year later. Tyler was a good stepfather to Jaxon, teaching her about weapons and tracking, but he was very abusive to her mother. When Jaxon was fifteen, Tyler killed her mother and younger brother, then disappeared. Jaxon was taken in by Russell and Bernice Andrews, who were gruesomely murdered by Tyler two years later.
Due to her tortured past, Jaxon Montgomery was a troubled woman. She became a police officer and was about to raid a warehouse at the start of Dark Guardian. She was shot several times, but Lucian Daratrazanoff saved her and healed her. They took down Tyler Drake together. They went on to fight vampires together and Jaxon is the first human heroine we meet to actually fight vampires in her own right, alongside her lifemate.