A former Cursor Callidus, Fidelius turns traitor to the Crown at the outset of Furies Of Calderon. He has an extensive knowledge of the Deeps below Alera Imperia. Fidelius, like most earthcrafters, also hates flying. He has the ingrained habit of checking anywhere he goes for the best route of escape. He then began to play the role of traitor to Lady Aquinitius while inside he had conflicting emotions which made him realise he in fact needed to follow his heart and support to the true heir to the realm.