メイジー・ウィリアムズ
In the episode, the alien time traveller the Twelfth Doctor (Peter Capaldi) and his companion Clara (Jenna Coleman) have 24 hours to train a group of weak Viking villagers for a war against aliens called the Mire shortly after the Mire slaughtered all of the village's warriors and a woman called Ashildr (Maisie Williams) subsequently declared war.