Mary Arkham, better known by her alias 'Lady', is a skilled human demon hunter in the Devil May Cry series. Driven by a tragic past and her quest for revenge against her father, Arkham, Lady is a strong-willed and resourceful character. She is known for her proficiency with firearms, especially her signature rocket launcher, Kalina Ann. Lady often finds herself at odds and in alliance with Dante, serving as both rival and ally. Her determination and humanity add depth to the series' complex narrative.