Aodhan's Past

The unnamed captain, did Aodhan directly succeed him or were there more captains between them? I found something interesting in Strategy Guide:

“	Oh and one more thing... I totally forgot about this.... Do you... remember the name that was mentioned in that letter box...? Colbha? I found out who Colbha was. It's actually an alias used by the leader before Aodhan... ...I think he also passed away during the tragedy of Emain Macha... ...Esras, to gain the sole control of the Paladin Order of Knights, devised a plan using Colbha, and once he became expandable, she gathered up the evidence and... eliminated him... It's becoming more and more clear that Esras will do anything to get her way. Please be careful.	„
—Price

If Aodhan did directly succeed his unnamed mentor, its Esras's fault Aodhan's unhappy, not just causing the Tragedy.