Treguard the Dungeon Master was the host of Knightmare. He presided over the gameplay from an antechamber in Knightmare Castle.
Rothberry was an amusing alchemist and apothecary who conducted bizarre experiments but usually managed to find something useful for dungeoneers.
Issue 90 of Retro Gamer Magazine includes an article on 'The Making of Knightmare' by writer Andrew Fisher.