Ушіромія Марія

Maria is a rather innocent child, and fully believes that her mother needs to work such long hours and weekends. Rosa often forgets Maria's promises, but Maria says that her mother's work is more important. Rosa has told Maria never to call her work office unless it's an emergency. But, once when Maria called, the office told her that her mother wasn't at work. Even when Rosa takes impromptu holidays with her various boyfriends, Maria fully believes in her mother. Rosa often gives in to guilt, and ends up buying Maria presents, such as 'the rabbit band', or various Western sweets.

Maria as a witch: In the Umineko series it is heavily debated whether magic exists or not, but Maria has her own personal grimoire, in which she conjures up her own spells. Such as, 'have [x] for dinner', or 'make mama come home early'. One particular spell is for her mother's love, where all that is required is a simple 'uu-uu'. Maria came up with this spell after a rather touching day spent with Rosa on a picnic. Rosa taught Maria a song, and Rosa was so pleased that Maria knew the words. However, when Maria forgot the words, she started singing 'uu-uu' instead, but Rosa remained in her happy state.

While Rosa thought that her saying 'uu-uu' was charming for a while, she eventually grew frustrated with it, and often resorted to hitting her. Whenever Rosa hits Maria, Maria says that she has been taken over by 'the black witch'. Maria is a member of the Mariage Sorcière, an alliance of witches in which she and her idol, Beatrice, are exclusive members of. Despite having the same wand as Eva-Beatrice, she is not an Endless Witch successor. By succeeding to give a soul to Sakutaro, she is a potential Creator: a witch with an even higher rank than Bernkastel and Lambdadelta, who (when she will learn how to use her power) may be able to create even a galaxy from nothing.

She is also the witch teacher of Ange, despite the fact that they did not see each other as she was banished from Mariage Sorcière.