David Eddings Wiki

Bheid was the Exarch of the Grey Robes and a former Black Robe priest. Bheid was first met by Althalus and Eliar in the ruined city of Awes, where he saw them murder an agent of Daeva masquuerading as a priest. 

Bheid was a very religious man, but despite that, he had trouble believing in his own religion. That trouble later developed into a personal theological crisis, after he killed Yakhag

Bheid's word/task on the Knife was to 'Illuminate'. His task was to defeat Argan. He was made Exarch of the Grey Robes after the Exarchs of the White, Black and Brown robes created his order. 

At the end of the story, Bheid is married to Leitha by Dweia.