Maria's name comes from the name Mary as in the Virgin Mary from Christianity due to the fact that she believes she was a virgin birth because Rosa always told her she never had a father.
Hi my name is Maria Ushiromiya!
uu~ i hope we make friends and have a good time ^0^
Maria Ushiromiya (右代宮 真里亞 Ushiromiya Maria?) is the daughter of Rosa Ushiromiya, and the granddaughter of Kinzo. She is prone to childish and whimsical behaviors, of which her mother usually punishes her for by slapping and abusing her in many ways. Maria takes pride in her knowledge of magic and knows Beatrice's epitaph by heart. She is usually the one who receives the letters from Beatrice or finds them after revealing another closed-room murder.
She has short light brown hair, fair skin and violet eyes. When she smiles she appears sometimes to have a snaggle tooth. She is of short stature due to her young age and weighs 28 kilograms (61 pounds).
For bottoms, she wears a black skirt with a pink stripe at the bottom and a lacey slip underneath. Going up, she has on a pale pink long-sleeve button down shirt, with frills of the same color on the shoulders and the collar.
Over this, she wears a dark, sort of navy blue color corset, of which, on Maria's left side, has the family crest in gold at the top, and red ribbon lacing up the front. Maria wears white knee-high socks with a lacey rim at the top and red Mary-Jane-like shoes that buckle over the top of the foot and around the ankle.
On her head, she has a small black crown, tied with a red ribbon whose bow sits just under her chin. She almost always has her pink purse, of which has a red scarf tied around it. It is in this bag that Maria carries the envelopes she recieves from Beatrice. In the latter arcs, she is also seen playing with and talking to her stuffed lion, Sakutaro.
Maria is a child of elementary-school age (in the first episode, her mother confirms that she is "nine and a fourth grader"), though usually acts as though she is much younger. This often gets her in trouble with her mother and earns her a slap or two on the cheek. Normally she acts younger than her age but seen as cute by many. But when talking about witches, her personality changes and acts creepily. She also becomes defensive when someone rejects witches and magic which she believes to help her become happy.
She deeply loves her mother and even believes that the abusive and neglectful side of her mother is not her mother but a witch possessing her kind and loving mother to do horrible things despite them both being Rosa. She even went as far as defending Rosa's action in her diary and through Sakutarou's thoughts which in turns are her own thoughts when Rosa is not being a good mother. There are even times when she stated she does not need anyone but just her mother. It is also stated by Will that she never lies.