Rosaria is one of the sisters of Mondstadt's Church of Favonius.

Though she is just as much a woman of the cloth as the likes of Barbara and Jilliana, people tend to make a mental distinction between Rosaria and other members of the clergy.

While she might dress the part — at least, to a certain extent — her speech and actions do not reflect her office in the slightest.

Furthermore, she displays even less reverence towards the gods than the ordinary citizens.