The kid had to wear something and while her clothes might seem stylish to our eyes maybe I think their not supposed to be part of the nobles’ fashion.She has chains after all…
Regardless, I don’t think the Seekers treated her badly in any way.They just held her captive as a means to use her later.Perhaps when she was older.
I suspect the Seekers stold Orta from Azel when she was a baby.And altho unlikely, killed Azel in some way…