After a little tour, Miko encountered at least two slave markets and one black market. These places were pretty hidden, but it would be easy to find if one would seek them further.
However, Miko wasn't there to visit or buy anything. Dory wants to witness how the slaves are treated by their new masters under the so-called laws and regulations.
"That's the third person. I guess that has been proven to be true. Thank you for accompanying me here." Dory sighed after seeing the third person. She found it complicated for some reason.
"..." Michael remained silent as he didn't want to offend the mermaid lady.
Even though somewhat similar to servants, the slaves didn't always come from a willing person. They could be criminals, big debtors, those who suffer from poverty, survivors of monster invasions, or even kidnapping victims.