Priestess is a supporting character in the story Priest. She is introduced as a former Warrior Priestess, a woman who previously served as one of the Church's trained holy warriors before her time in that role came to an end. Because of this background, she is already a seasoned fighter when the story begins, and her combat experience defines much of her presence in the narrative.

In the story, Priestess joins Priest and the young lawman Hicks in the search for Lucy, the niece of Priest, who has been taken by vampires. She takes part in hunting down the vampires responsible for the abduction and fights alongside the group as the mission unfolds. Her role is that of an ally and capable combatant rather than the central protagonist, and her actions in the tale are tied to this supporting mission.

As a former Warrior Priestess, she possesses superhuman physical abilities, including enhanced strength, speed, coordination, and agility. These abilities allow her to fight effectively against vampires, keep pace with the other warrior characters, and move with the speed and precision expected of someone trained for combat. Her fighting skill is a direct extension of her former training, and she applies it in service of the rescue effort.

Her key relationships in the story are with Priest, whom she assists in his personal quest to recover Lucy, and with Hicks, with whom she shares the task of tracking and confronting the vampires. Her motivation is tied directly to the mission she joins: helping Priest find Lucy and opposing the vampires responsible for her abduction. The story does not center on her personal arc, so her individual development remains secondary to the events surrounding the main character.