
Originally Posted by
Rosenstrauch
As for Zenos...
On the note of Emet-Selch and Hythlodaeus:
My guess is that Zenos already had some dormant form of the Echo, and the Resonance essentially put a double layer on him, which allowed him to use some of the more advanced Echo abilities the Ascians, such as determining soul colors, body-hopping, I think he did the void portal teleport at one point, and so on.
That said, I don't think either Emet-Selch or Hythlodaeus are involved. As far as we know currently, nobody involved in the Resonance project knew Solus was an Ascian, and at this point I don't think Emet-Selch cared about any of his human progeny. Likewise, Hythlodaeus doesn't seem likely, seeing as the one we interact with is a simulacrum and the original has an unknown fate (we don't know if they died during the Final Days, were sacrificed to Zodiark, or something else).