The Cassisian Angel
Appears to be an ornate Ulfen Helm with wings.
This “helm” is actually an angel named Helgarval, who serves Desna. Summoned to the Material Plane, it was stranded when its master died and is trying to do enough good deeds to attract the attention of its masters in Elysium so it can return.
After being discovered on the funeral ship of Snorri Stone-Eye, the helmet was worn by Bariel, and decided that he was worthy of knowing the truth about the angel’s identity.
Grants Bariel a lesser protective aura at all times, can constantly detect evil and know direction, and is willing to cast aid and daylight for him once a day.