Arianrhod (アリアンロード, arianroodo), also known as the Steel Maiden (鋼の聖女, hagane no seijo), is the seventh Anguis of Ouroboros and leader of the military unit Stahlritter. She is considered the strongest fighter among Ouroboros and it is thought that in a fair fight, Zemuria-wide only Ein Selnate would stand a chance against her. Arianrhod puts her loyalty for the Grandmaster above anything else.