Dora is a witch who schemes to seize control of Camelot. She steals the sheath of Excalibur after it is taken from Marina, using it to advance her ambitions. At a pivotal moment, Dora reveals her true nature as a witch and then attacks Marina by grabbing her neck, driven by fury after her plans are foiled. Her actions compel Arthur to draw Excalibur from the stone to save Marina, leading directly to Dora's defeat. Arthur's actions, motivated by justice and love, result in her downfall and his rise as the new king.