🎀 Wisteria 🎀

But we already know for sure that slave owners exist in our world. So, if you're an Arteryian, and not too fanatical about it, nothing will change.

That's why I wrote about open slave owners versus those who keep it a secret. Think about it: why would an Arteryian character work with (or even for) someone like that without a very good reason? And there isn't really a reason (unless he himself is a slave), considering that the player organization is far from the only employer in this world. A fanatical one would try to free the slaves. A non-fanatical one would simply find another job.

Business comes before likes and dislikes. As player characters, we can take on almost any task without much mental effort, except for the truly insane ones.

Far from every character will take on any task without mental effort. For example, in a conflict between two countries, one of which is where the character's family lives, it would be strange for him to support the other side, if he loves his parents. It would also be strange for an Arteryian to take on quests against Reginalve, unless he is some kind of very special heresiarch.