Fifi is shown to be energetic, bubbly and loves to hang out with her friends. However, she's also short-tempered, aggressive and even a little violent at times. But for the most part, Fifi has a good heart and is usually pretty nice despite her brashness. She is loving, but very protective of her little sister Katie and gets really angry when someone messes with her. She suffers OCD and is very strict and organized when it comes to cleaning. She absolutely hates gross things.