Sir Dinadan is one of the knights who serve King Arthur at Camelot. He is a prankster and a jokester, although Hank Morgan finds his sense of humor unfunny and outdated. He is the inadvertent cause of Hank’s duel with Sir Sagramore after Sagramore overhears Hank wish that that the Dinadan would die in his joust and mistakenly believes Hank’s comment is directed at him.