Oris is a priest of the Cathedral of Light, second only to Inarius and equal in power to Gamuel. She worships Inarius in his prophet form, and is quite infatuated with him. Despite Inarius appearing as an adolescent and Oris being an elderly woman, the ages are quite reversed and Inarius is centuries older than Oris.
Despite having only ever loved and worshipped her prophet, Inarius, she is sacrificed towards what he sees as a greater good. Inarius offers her body to the spirit of Malic as his current body is expiring so that he might use Malic as a lieutenant to his army of Inquisitors against the Edyrem.