ウリエル

A demon that protects Maria. He is strong-willed and foul-mouthed. Despite being a demon himself, he assists her in her exorcisms. It's not because he wants her soul, but it looks like he has some other special reason.

Ururu is Uriel's temporary form. He usually looks like a stuffed animal. Since it is only a temporary form, he cannot use his original power in it.