Not much is known about Marifa, except that she is a trickster who feigns innocence in front of her brother, who believes that she is without fault. Popee's reasoning is that he can't possibly think his sister is anything other than a good person. Kedamono is aware of her true nature, however. Ryuji Masuda refers to her as a "sweet devil". Marifa is innocent, though she is selfish.[Despite being a trickster, she is not violent like her brother.