An old man clad in heavy dark robes, bearing a staff that is surmounted by a smoking censor in the shape of an hourglass. 
In the Age of Sigmar he was leading a caravan of pilgrims travelling to the temple of the Order of Final Rest in the Blood Wastes. They were attached by Khorne Bloodbound and rescued by Stormcast Eternals under Lord-Celestant Tarsus Bull-Heart and more reluctantly, Mannfred von Carstein. 
He and the other pilgrims then waited at the temple for them to return from their pursuit to tend to them until they could return to their contemplations. 
|We bid you greetings, restful brother, we come from Morrsend to honour the old debt and deliver our tithe, as we swore in bygone days
~ Gerot to brother Markus.