Kessa and Mudaro were powerful and dangerous monsters. Not because they could easily overwhelm Markol with their aura, but because they were both leaders of the Blood Fangs.
They earned their place at the upper level of Varreyn mainly by taking on hunting and assassination contracts. It depended on who their target was.
Basically, they were powerful mercenaries whom anyone who wanted to get rid of an enemy or competitor would turn to, and who were willing to pay a hefty sum for it.
Sure, money alone wasn't enough to reach the upper level, but the Blood Fangs' influence allowed them to do so.
Their selection process for joining the organization clearly demonstrated this. It was one of the strictest and most lengthy. Kessa and Mudaro tried to recruit only the most talented and ruthless individuals into their ranks.
As leaders, they had proven themselves quite capable, but that in no way guaranteed that their attack on the Grad Family would be successful.
