God I think sten in the fade might be the most heartbreaking one. Yes, Morrigan straight up can't believe her mother would ever care for her, yes Alistair just wants a family, yes Zev is out there literally getting tortured because that's familiar to him but there's something so subtle about Stens moment that I just love bringing him along.
Because he's...he knows. In a way. He knows exactly what's going on. He's not fooled into thinking this is real like Alistair or Wynne or Leliana or Zev. But equally he's not arguing his way out like Morrigan. When you talk to him he knows who you are, and why you're there, wants to make room for you at the fire.
Sten is... reminiscing. He's with these men who he knew who died and whose death signalled the end of his last true connection with home (both because of their deaths and because of the loss of his sword). He even says that the fade is no different from being in Orlais or Ferelden - none of it is home. It's such a stark contrast to Stens usual no nonsense tone and it really cuts to the heart of him and what makes him such a compelling character.
To get him to come with you, you remind him that he made an oath to you or other soldier things. Sten needs that order to be pulled from his memory here.
And it's just...it's heartbreaking. He misses home. He feels he can't go back. He doesn't know what the point is anymore. And it is the warden that quite literally gives him order and the ability to go back after his sword so he can head home. It's connection to people - you the protagonist specifically - that helps Sten move past his grief. And in that way, Sten mirrors Alistair and Oghren but that's a whole other post about themes of loss and grief and moving forward in origins ill make some other time.
(I also like it because it shows that Stens companions were joking about and very un-Sten like. I think there's this idea that flies about that before Bull was introduced, the Qunari were all very serious and stoic people and bull was a retcon in that regard. But we see Stens friends laughing about the lack of good food in Ferelden and making jokes)