Jabarkan Cromwell dari Daftar karakter The Familiar of Zero

is the leader of Reconquista who is responsible for the Albion war. He is the one who gave the orders to Wardes to kill the Prince of Albion. He also uses the 'Ring of Andvari' that they stole from the Water Spirit to control people. In the light novels, he is killed during Gallia's bombardment of his HQ after Gallia reneges on the secret treaty. In the anime, he is defeated by Louise's classmates in the invasion of Tristain and thrown in jail, but during the events of Henrietta's coronation, he is killed in his cell by Sheffield, who has reclaimed the ring. Cromwell is named after Oliver Cromwell, a political leader in England in the 17th century.