TV-Series
Description
Adelicia Lenn Mathers is a central character from the anime Rental Magica. She is the hereditary leader of the prestigious Magician's Society known as Goetia and is a direct descendant of the biblical King Solomon. This heritage positions her as a practitioner of the Magic of Solomon, a powerful and ancient form of sorcery.

In terms of background, Adelicia is a young woman of British origin, depicted as being in her mid-to-late teens and attending high school in Japan. She inherited her position as the head of Goetia following the death of her father, Oswald Lenn Mathers. This made her the youngest leader in the organization's history, a fact that created significant friction with the larger magical Association. Prior to assuming this role, she was a student at a prestigious magical academy in England, where she was an arch-rival of Honami Takase Ambler, competing with her for the position of top student. Adelicia ultimately left the academy to take control of Goetia.

Personality-wise, Adelicia is known for her calm, collected, and analytical demeanor. She remains unfazed in the face of danger and prefers to make well-informed, strategic decisions. Despite this cold and sometimes critical exterior, she possesses a strong sense of justice and has shown genuine care and concern for her comrades. Her high standards apply to both herself and others, and she has a notable dislike for incompetence. A more personal and less controlled aspect of her personality is her romantic interest in Itsuki Iba, the president of the magical dispatch company Astral. Her affection manifests in a competitive and often violent manner; she is quick to criticize Itsuki for his perceived lack of ability and will physically strike him, such as hitting him on the head, whenever she perceives another girl paying him attention. Despite her aristocratic bearing and magical prowess, she is famously lacking in culinary skill.

Adelicia's primary motivation is tied to her family and her legacy. She pursued her father to Japan after he committed a magical taboo, seeking to resolve the situation. With the assistance of Astral, she was able to suppress the evidence of this transgression, solidifying an alliance between herself and the company. Her role in the story is that of a powerful ally, a rival, and a major shareholder. During the Alchemist incident, she acquired a significant twenty percent stake in Astral's operations, which gives her considerable influence over the company. Following this incident, she frequently fights alongside Astral's employees, making her an integral part of their operations.

Her key relationships are central to her character. Her dynamic with Honami is a complex mix of intense rivalry and underlying mutual respect, with the two often bickering yet ultimately trusting one another. Her feelings for Itsuki Iba drive much of her personal behavior, as she balances her professional relationship as a shareholder and ally with her romantic jealousy and desire for his attention. She also commands a host of demons from the Ars Goetia, with whom she has a unique relationship, particularly her pact with the powerful demon prince Asmoday, which demands she constantly dedicate herself to expanding her magical power.

Regarding her development, Adelicia begins as a formidable but somewhat distant figure who is primarily focused on her own goals and her father's legacy. Through her interactions and battles alongside Astral, she becomes more integrated into the group, evolving from a rival and temporary client into a permanent shareholder and a trusted fighter who works alongside them regularly. She also matures in her role as a leader, having to navigate the political pressures of the magical world while balancing her personal desires.

Adelicia's most notable abilities stem from the Magic of Solomon, which allows her to summon and command the seventy-two demons of the Ars Goetia. Her summoned demons are predominantly powerful attack-types, reflecting her own aggressive and direct personality. She has demonstrated the ability to summon high-ranking demons, including counts, earls, and princes, and is one of the few mages capable of summoning Asmoday. Beyond summoning, she is capable of astral projection and, like all mages in her world, can see and interact with ghosts and spirits. She also possesses a keen ability to sense magical presences, such as detecting magical connections between other mages and their summoned entities.