Albus is a young witch from the anime Grimoire of Zero, introduced as a companion to the main characters on their journey. While initially presenting as a boy, Albus is later revealed to be a girl, an androgynous guise adopted to navigate the dangers of a world deeply hostile to witches. Her original name remains a secret, and she is known to be the descendant of the legendary witch Sorena, who was executed amidst the conflict between humans and magic users. Orphaned at a young age after her parents perished, Albus was raised by her grandmother Sorena until her death.

In her early appearances, Albus is shown to be an assertive and somewhat arrogant young magician with a fierce and uncompromising attitude. She initially harbors a strong hatred for beastfallen, the half-human, half-animal beings in the world, but her views begin to soften as she travels with the group. Her personality is a blend of patriotic fervor and a lighter, more playful side, often expressed through dry wit. She is pragmatic and empathetic, driven by an unyielding dedication to the ideal of peace, even as she hides her true identity and motives.

Albus's primary motivation stems from the tragic fate of her grandmother and the ongoing war between witches and humans. She seeks to avenge Sorena and end the persecution of witches, but her goals evolve beyond simple revenge. She becomes a central figure in the struggle for coexistence, aiming to create a world where humans, witches, and beastfallen can live together without conflict. Her role in the story is that of a key ally and later a leader. In the main narrative of Grimoire of Zero, she joins the beastfallen Mercenary and the powerful witch Zero on their quest to find the Grimoire of Zero, a powerful spellbook. Her knowledge of magic and the political landscape proves invaluable to the group. In the sequel series The Dawn of the Witch, set several years later, Albus has become the first female headmistress of the Magic Academy of Wenias, where she dedicates herself to fostering the next generation of mages and maintaining the fragile peace.

Her key relationships shape her development significantly. Her bond with Zero, the author of the Grimoire of Zero, is one of mentorship, as Zero teaches her new magical techniques and broadens her perspective. Her interactions with the Mercenary, a beastfallen she initially despised, challenge her prejudices and contribute to her ideological shift. Another crucial relationship is with Holdem, a wolf beastfallen who was bound by oath to protect Sorena's bloodline and becomes Albus's steadfast guardian and protector. Their relationship is marked by mutual respect and occasional tension, rooted in their shared past and his unwavering duty.

Over the course of the story, Albus undergoes considerable development. She matures from a vengeful and prejudiced youth into a pragmatic and compassionate leader. Her initial desire for retribution is channeled into a larger vision for societal reform, as seen when she later takes dramatic action to publicly end a threat to the peace, albeit with a hidden mercy. Her time traveling with Zero and Mercenary exposes her to different viewpoints and forces her to reconsider her rigid beliefs about beastfallen and the nature of magic itself.

Albus is a highly capable magic user with a wide array of notable abilities. Her arcane prowess includes powerful memory-altering spells, which she uses to protect others from traumatic pasts. She demonstrates elemental mastery over earth, fire, and light, using these for both offensive and defensive purposes, and is also proficient in profound healing magic. These abilities are augmented by her command of the Grimoire of Zero, a tome containing formidable and volatile sorcery. Her magical education is further advanced by Zero, who provides her with practical instruction, such as spells for fishing.