Asamonsi's actions were full of deception. He never revealed his true intentions. He wholeheartedly helped Lu Li and never outright accused Chris of being the culprit—precisely because of this, Lu Li never suspected him.
Asamonsi's betrayal became partly understandable as Lu Li regained his thoughts. He had realized what the Rat Men signified.
Among the four lords, apart from the soulless head chef, the remaining three lords had been awakened. The only ones who could be feeding the Rat Men in the castle could only be other souls.
It could be the cook, possibly the Bat Guards, or other servants doing this.
Asamonsi detected a possibility: the Viscount might also be involved.
So he used the excuse of summoning Claire and the Undead, using some method to make them betray and lured Lu Li into a trap.
