As I was re-reading WoK, I noticed Taravangian say something odd. When he revealed himself to Szeth, he says “Sometimes I wonder if the Lifebrother himself sent you to me.”
To which Szeth replied, “To bloody myself so that you wouldn’t have to. Yes, that sounds like something one of your Vorin gods would do.
Knowing that people associate Stormfather with Jezrien, who is worshipped in Vorinism, could the Lifebrother be the Sibling?
The name pattern is similar. Stormfather, Nightwatcher, and now Lifebrother. And if the Sibling was necessary for “life” to survive on Urithiru, then the name is also appropriate.
I haven’t seen any other reference to this outside of this scene. So the question is, could the Lifebrother be the Sibling?