Nokkfylla Shine-Eye (died 870s) was a Norse drengr who served under Ragnar Lothbrok in the Great Heathen Army alongside five trusted lieutenants during the raids that were part of the Viking expansion into England.
As an adult, Nokkfylla was prone to sudden but strong bouts of mental unease. On joining Ragnar's army, Nokkfylla found that his commander easily "steadied the ship" of his mind. After the death of Ragnar in 865, Nokkfylla wandered the English countryside for several decades, without a purpose or cause to fight for.
Nokkfylla soon made an abode for himself in an abandoned, collapsing fortress in the snowy reaches of north Eurviscire. Without Ragnar to calm him and provide direction, Nokkfylla's mind began to fray such that he easily scared himself, and he soon murdered at least a dozen individuals who had ventured too close to his camp.
Despite learning that some of the dead were guilty of various crimes elsewhere, he was repulsed by his betrayal of the drengr's code of honor. Seeking a warrior's death in order that he would be put out of his misery and hopefully reach Valhalla, Nokkfylla fought the shieldmaiden Eivor Varinsdottir of the Raven Clan in ritual combat and was killed.