The Duamvi are a race from the Spirit Plane, who serve the Triad of Angels in cohorts of unique training. The first of these came to Sapience by accident. Preceptor Merkava, Nianvi, and Asim arrived via the Orb of the Dawn, but it broke in their flight from encroaching shadow in their war-torn plane. Servants of Ael'mael, they brought the Templar teachings to the Paladins, and helped them grow with more potent skills with which to fight. They have since established a home in Enorian, followed decades later by Exarch Aban and his contingent of Akkari warriors.
Unique in their anatomy, Duamvi are a symbiotic race. A host must willingly accept their Duamvi counterpart, a being that appears as changing, trailing light. This union is a complete merging of the two: not two consciousnesses but one, Spirit and Body empowering each other. This ritual is closely protected by the Akkari, who safeguard the process within their Bastion.
Native hosts of the Spirit Plane were bred for the purpose of this unity. Exarch Aban is the strongest known of these Duamvi, blessed by Ubarin and Ascended above his kin. Mortals from the Prime Material Plane may not be as ideal, but their substance of mixed elements both allows Duamvi to better acclimate to the Prime Plane, while also providing constraints they would not face in their homeland.
Duamvi can be slain, but their bonded souls find order and draw back towards the Spirit in the Prime Material Plane. This vulnerability is painful for both.