The Wizard Brendenmyr

Mind broken by the nature of resurrection after death; Brendenmyr's soul is contained and housed within a gold mask that he must forever wear upon his face to preserve what little sanity remains. However, due to the fractures in his psyche, not all of his mysterious actions are his own but reflections of the breaks in his own self that returned.

This most noticeably manifests itself by the mask changing as it covers his face as one of the others takes over.