Green Beard, from Ultima IV
Green Beard was docked at Buccaneer's Den when the Stranger visited the town. The Stranger met him at the Basic Armour armoury, where he was buying armour for his crew. He was trying to find magical armour if possible, and asked if the Stranger knew where to buy Mystic Armour. It seems he was unaware of the Avatar-related requirements needed to wear such armour.