Question about Eshonai's voices

[Seonookim]

Eshonai hears voices advising her. Is this Odium, or the stormspren?

 

Buried within those new rhythms, the names of which she had intuited somehow, she could almost hear voices speaking to her. Advising her. If her people had received such guidance over the centuries, they surely would not have fallen so far.

 

[Swimmingly he/him]

We don't know. It's virtually certain that these voices are "of Odium" in some way: His minions, spren, or just power expressed in voices within her rhythms. The stormspren might be saying these things, but the plural suggests that it simply acts as a gateway for greater forces.

[Numb]

It could also be the same spren/unmade that was messing around with Szeth. It seems capable of changing it's voice and speaking directly to a person's mind.

[Argent he/him]

I assumed, rather casually, that they are the Unmade. One per Rhythm. But I assume a lot of things about the Unmade...