One of the most evil things you can do in Planescape: Torment is to sell one of your companions as a slave. By request from thesnare100 I created this video to show how the NPCs react to being offered as slaves to Vrishika.
To summarize:
You can sell Morte, Dak'kon or Nordom.
If you try to sell Fall-From-Grace, Vrishika refuses to buy her.
If you try to sell Annah, she leaves the party and attacks you, and Vrishika and Standish also turn hostile.
You can't even offer to sell Vhailor or Ignus. But then, they wouldn't make very good slaves... ;-)
