Fear

While watching the battle unfold the two holy maidens were shocked and in awe of Ren's power and skill. As the battle got even more intense Rachel was having a hard time controlling her urge for battle. It was as if her patron God was whispering in her ear, telling her to join in the battle. The urge to battle was so strong that even in a weakened state Rachel wanted to move and enter the fray. 

It took every bit of Rachel's willpower to stop herself. Joining in a battle like that was suicidal, still, the urge was so strong. 

When the battle was at the climax, the two holy maidens saw the undead elder lich looking like a scared little boy. They weren't really sure but from a distance, it looked like Alfred was backing away from Ren. It was a weird sight since undead beings do not have any emotions to show. Yet here was an undead being and a high ranking one at that showing fear.