The guy who researches spirits
He was an Ordo Dracul member, one of the few who got out of the kiddie pool. Later on he released a Strix during a Crone initiation ritual. Together with Mister Albert Heckles he managed to capture it, but during that Helena Viljamson died.
In fallout of this event, Mark was enslaved by Lady Otilia Auksaburne as a punishment and his mind made a lot more servant like due to Otilia’s excellent Conditioning skills.