Sancteon is one of The Watchers of Ardera, an eternal dragon which is the incarnation of all the material and represents the embodiment of souls. He is a metallic dragon with orange eyes and a blue'ish grey scaleless skin.

During the events in Rhea, he protects Xandor Arys until his sacrifice to save Xelath Thalodan. Sancteon then merges with Aventador and protects Noris Tarell until the Second Rebellium.