Leofgifu grew up an orphan after losing her parents to a plague in Grantebridge. In order to survive, she became a bandit and eventually sought work as a mercenary, becoming an adept fighter. The Order of the Ancients took notice of Leofgifu's activities and thus recruited her. Making use of her position as a valued mercenary, Leofgifu began amassing an arsenal of weapons for the Order and quickly insulated herself into a position of command by distributing luxury goods to fellow officers, such that they would turn a blind eye to her illegal acts. By the 870s, she was based in a Saxon military camp at Utbech near the city and had two bodyguards following her.
Eventually, the Viking Eivor Varinsdottir, an ally of the Hidden Ones, tracked down Leofgifu, once she finished renovating the Hidden Ones' bureau in Ravensthorpe. Due to Hytham's note, Eivor headed straight to the camp and assassinated her, thereby putting a stop to her procurement of weapons.
- The name is an Old English name meaning "dear gift", combining the elements leof "dear, agreeable, beloved" and giefu "gift".