Rosaria, a former member of the Knights of Favonius turned nun in the Church of Favonius, is characterized by her icy demeanor and commitment to her duties. Despite her cold exterior, she possesses a strong sense of justice and a dedication to protecting Mondstadt's people, a trait stemming from a mysterious event that led her to question the traditional ways of the Knights. Her outfit in Genshin Impact reflects her role as a nun, featuring a black habit with white trimmings.