As captain of the Prydwen, Kells is responsible for keeping the airship flying and maintains order and discipline among the crew. He joined the Brotherhood when he was a child, as a squire, rising up the ranks until he became a captain. He is also responsible for overseeing the training of members, particularly the squires, ensuring they get the education and training they need, as well as the chance to experience combat up close.
He is the highest-ranking member of the Brotherhood's air force division.
While other lancer-captains do appear in the game, Kells is given the authorities of making ship-wide priority alerts to the entire crew, coordinating with a proctor in assembling sweep and retrieve teams and duty rosters, as well as the responsibility of piloting the Prydwen across the east coast.