Frederica Baumann is a half-elf maid who works at Roswaal L. Mathers' mansion. She is known for her cheerful and energetic personality, along with her exceptional cooking skills. Frederica is deeply loyal to those she serves and protective of her loved ones, particularly her younger brother Puck. Despite her seemingly carefree demeanor, she possesses combat abilities and can transform into a more powerful form. She is straightforward in her communication and often acts as a stabilizing presence within the household, providing emotional support and practical assistance to the main characters.