Gazelle serves as the private secretary to the Duke of Normandy, the powerful Home Secretary of the Kingdom of Albion. Her role, however, extends far beyond clerical duties, as she also functions as a highly trusted intelligence agent and a formidable enforcer for her superior. A woman of brown skin and black hair, she is most frequently distinguished by her round glasses, which lend an air of studious seriousness to her otherwise imposing presence. Her fashion is neat and practical for a secretary, though she has been seen in various outfits ranging from a white suit to formal gowns while on missions. Speculation within the story's setting suggests that her physical characteristics indicate she may hail from one of Albion's colonies or possess that ancestry.

Gazelle's most defining personality trait is her unwavering composure. She is exceptionally clear-minded and capable of performing under immense pressure, adapting to sudden changes in a situation without visible distress. Quiet, cold, and inherently serious, she rarely speaks more than is necessary and approaches her work with a chilling, emotionless efficiency. This calm demeanor masks a ruthless dedication to her duty; she undertakes a wide variety of high-stakes tasks, including serving as a bodyguard, making direct contact with key targets, commanding military forces of the Ministry of Internal Affairs, and personally carrying out lethal extractions. Her motivation appears to be absolute loyalty to the Duke of Normandy, acting as an extension of his will—what some describe as his hands and feet. There is little known about her personal history prior to entering the Duke's service, as her identity is almost entirely defined by her professional function.

Within the narrative, Gazelle operates as a secondary antagonist and a persistent obstacle for the main characters. Her pivotal moment occurs during a confrontation with a man named Danny McBean. When Danny attempted to demand a larger reward, Gazelle, without a word of warning, killed him instantly by striking his head from a considerable distance with her unique weapon. This act not only demonstrated her combat prowess but also solidified her reputation as a dangerously cold and focused operative. In other instances, her abilities as a strong leader are evident, such as when she commands forces to set up roadblocks and coordinate security operations. Her primary and most significant relationship is with the Duke of Normandy, whom she serves with unflinching loyalty and who appears to trust her implicitly with his most sensitive and dangerous affairs. Beyond this, she is an object of fear and respect from colleagues and adversaries alike.

Gazelle's development is not a journey of change but a deepening revelation of her capabilities. She remains a static character whose threat level is showcased through her actions. Her notable abilities are extensive. She possesses significant physical strength that others consider abnormal for a woman, allowing her to wield her equipment with deadly force. She is an expert in the use of throwing weapons, particularly a hybrid pistol-sword that she can hurl with devastating accuracy over long distances. Additionally, she is proficient with other arms, such as an axe-gun, and her experience includes not only direct combat but also the strategic command of soldiers, making her a versatile and highly dangerous agent in the Duke's employ.