Who is Dench, the Groom from The Favored Child and what is their importance?

Clary Dench is the niece of the groomsman and Julia's best friend. It's Clary who spends long summer days on Wideacre with Julia and who tells Julia of the many legends and rumors - including the fact that either Julia or Richard will be the favored child who has "The Sight," inherited from Beatrice. Julia foresees Clary's death but is unable to tell when Clary dies, just as Julia predicts, at the hand of Richard.