Yesteel

Yeah that was always my theory when reading Oathbringer. There's that Stormfather quote in chapter 38 ". Hoping that the one they left in Damnation would alone be enough to hold it all together. The one who wasn't meant to have joined them in the first place, the one who was not a king, scholar, or general." It left me questioning why Taln would agree to become a Herald. Him being in love with Shalash makes sense considering how she acts around him.