Frederica has a wicked temper to match her strong fire-based abilities. She is often flying in to rages when someone does she doesn't like, especially insulting her or Marie. She dislikes outsiders and is loud-mouthed and inconsiderate. As a child she is often referring to herself as a spy codenamed "Sexy Rose". Frederica does have a nice side to her. She tells Marie she'll protect her during their fight with the W.I.S.E and she gives Ageha some encouragement when gets upset about Hiryuu and Oboro. Her best friend is Marie, who calls her "Fuu-chan". She spends most of her time hanging out with Marie, but will spend time doing other things like playing video games with Kyle and yelling at him for not taking it easy on her.