In a dark corner.
As soon as he left the sight of the paladins, Soran stumbled, and blood came out from his mouth.
He actually sustained severe injuries.
After facing the Vampire God alone, even with the power of the Holy Avenger, he was still hurt. During the battle, he could still suppress the injuries, but now that the battle was over, he did not have to hide it anymore. No matter what kind of people the paladins were, or if they owed Soran anything or not, the fact was Soran was of the evil camp. Thus no matter what, he had to act tough in front of the paladins.
The paladins today were only slightly radical. Some changes had not been completely completed, and they were still conservertive. It was only when the Avatar Crisis devastated the realm that the Divine Avengers gave up some dogmas completely and regarded law and order above good and evil.
That was because the damage brought by chaos was too terrifying!