Hilda

Hilda is a disguise used by Morgana Pendragon, in order for her to be able to go to Camelot as Princess Mithian's maid. The ageing spell used by Morgana in order to take the form of an elderly woman is entirely different from the one used by Merlin, as she used no other items in order to take that form, whereas Merlin uses potions whenever he wants to take the form of Dragoon. It is revealed that this spell still has its flaws, as Hilda's pulse was still that of a young woman, as revealed by Gaius.