Humans who previously entered that room would face the most painful torture of their lives. They definitely would not expect that they would be treated like that.
As long as the venom vampire who had previously led them inside had left the room, they had been able to communicate with each other.
"Where do you come from?"
“Long Sand Ville. How about you?”
“Los—”
They asked where they were from. They were getting to know each other. Interestingly, the slaves came from different regions. They did not know what criteria they take from these humans. They still could not find anyone coming into the room so the conversation flowed deeper and deeper.
“Did you notice that they have a different posture than humans?”
"Is that true? Maybe they are just humans who come from other countries so their bodies are different from ours.”
"No, I mean, they were so pale. It was weird."