[RoW] Kaladin and Zahel

[theSurgeOfPhysics]

Zahel mentions something interesting regarding Cognitive Shadows:

Quote

"Grand ideals," Zahel said. "Optimism. Yeah, you'd make a terrible swordmaster. Be wary of those Fused, kid. The longer one of us exists, the more like a spren we become. Consumed by a singular purpose, our minds bound and chained by our Intent. We're spren masquerading as men. That's why she takes our memories. She knows we aren't the actual people who died…”

RoW, Ch. 15

Going back to this scene after the book, I see that it ties in nicely with the idea of Heralds being like spren. So who is “she” here? Is it Ba-Ado-Mishram (BAM)? I’m wondering because Kalak mentions something similar in his last epigraph, and we know BAM affects the memories and thinking of spren and natives of Roshar (singers): 

Quote

As one who has suffered for so many centuries ... as one whom it broke . .. please find Mishram and release her. Not just for her own good. For the good of all spren.

For I believe that in confining her, we have caused a greater wound to Roshar than any ever realized.

RoW, Ch. 97

If it is BAM, how does Zahel know so much?

[Jozomby he/him]

Warbreaker spoilers (If you haven't read Warbreaker, definitely read that one.  I think it will help provide a lot of context):
 

Spoiler

The "she" here is referring to Endowment.  Zahel is a Returned, which is a cognitive shadow similar to a Fused.  When Endowment creates them, she takes their memories.