Father Frith is a priest in the White Knights' Castle during Azzanadra's Quest. He is a benevolent and kindly priest of Saradomin who refers to visitors as "child". Despite his generally kind and good nature, he is a stickler for protocol and seems to get upset if proper procedures are not involved in summoning Saradomin. During the quest, Saradomin explains to Frith that it's acceptable to summon him if there's a threat, since protecting people is his main goal.
