TV-Series
Description
Frederica Baumann is a maid in the service of Roswaal L Mathers and a member of the Emilia Camp. She is the elder half-sister of Garfiel Tinsel, and the two share a mother, Reala Thompson. Frederica, who is twenty-two years old and born on December 6, chooses to use her father's surname, Baumann, distinguishing herself from her brother who uses their stepfather's name.

Frederica has a tall and muscular build, standing at 176 centimeters (approximately 5 feet 9 inches), making her somewhat taller than Subaru Natsuki. She has long, pale gold hair and green eyes. Her most distinctive physical feature is a mouth filled with sharp fangs, a trait inherited from her quarter-demi-human lineage. While Subaru notes she would be a beautiful woman if she covered her mouth, her sharp teeth and the way her gaze can resemble that of a carnivorous hunter often overshadow her other features. She is self-conscious about her teeth and tends to cover her mouth when she smiles.

Her personality is a blend of kindness and strictness. She is a capable and dedicated professional who holds herself and others to a high standard, particularly when training new maids like Petra Leyte, whom she instructs with firm patience. Despite her no-nonsense demeanor, Frederica genuinely cares for those around her, especially her younger brother, Garfiel. Though she left the Sanctuary when he was young, she maintained their bond by sending him letters regularly. As children, she would frequently spar with him, and despite their age difference, she would often send him flying, demonstrating her early physical prowess. She has a hidden fondness for cute things, enjoying collecting dolls and dressing them in adorable outfits, though she personally lacks the confidence to wear such clothing herself, feeling it does not suit her frame.

Frederica's background is tied to the Sanctuary. After her mother left to search for her missing husband, Frederica and her younger brother were taken in by Roswaal and given a home. At the age of twelve, she left the Sanctuary to become a maid, first working for Roswaal and the Miload family, serving them for ten years. She had left her position some months prior to the main events of the story but was asked to return by Ram, who found herself unable to manage the Roswaal mansion alone following the disappearance of her sister, Rem.

Throughout the story, Frederica serves as a reliable support for the Emilia Camp. Her role becomes crucial during the events surrounding the Sanctuary, where she provides Subaru and Emilia with valuable information before her return to the mansion. She is fiercely loyal to Roswaal and possesses undeniable skill as a maid, but her true strength is revealed in combat. Due to her quarter-demi-human heritage, Frederica possesses the ability to beastify. This allows her to partially transform her body, for instance, manifesting the claws and tail of a large leopard, or to fully transform into a massive feline beast. In this form, her physical strength becomes tremendous, allowing her to clash with formidable foes such as the infamous assassin, Elsa Granhiert, and to destroy walls and furniture with her attacks. Her fighting style is direct and powerful, utilizing her transformed limbs and tail in melee combat. She has a unique need to gnaw on knives to file down her ever-growing fangs, a peculiar but necessary grooming habit. In her interactions with Subaru, she acts as a dependable senior, answering his questions earnestly and warning him of potential dangers, cementing her role as a trustworthy and formidable ally.