Arthur Ludorum
Arthur is a friend of Teppic, and successful scholorship student assassin mentioned in Pyramids. Although he starts out a little wet (saying his bedtime prayers [ie, sacrificing a goat]) and is teased by the other student assassins, he turns out to be the son of a famous now-dead assassin, Johan Ludorum, and has a great capacity for controlled violence, despite his small stature, baby-faced appearance and blond curls.
He and his mother appear to be the only remaining member of the Strict Authorised Ormist church.