It is precisely for such a responsible task that they send those without family or connections, because knowledge of the secret of Kha-Belekh grants a certain power over him, even making him dependent. Those without family serve more faithfully because they have nowhere else to go and are completely dependent on their master, and it is easier to get rid of them after the task is completed; no one will ask questions or stand up for them. The smart ones quickly realized that Agrail was a traitor; Biara was slow on the uptake and only figured it out by the 5th mission. If Kha-Belekh is so powerful, why didn't he just eliminate Agrail? This question arises. And the other demons began to ponder the same thing. As for the peasant women, I can only say that Agrail is an exception to the rule, and it is simply foolish to judge all other demons based on him, and Isabel is not a peasant woman.