I'm probably wrong with this theory ab the sword and shield but i personally thought the shield was yoon this whole time and hak is the sword bc im not sure in the manga beginning but i distinctively remember yoon protecting yona with a shield it's a bit flimsy but i feel like it fit perfectly...
idk dowun just seems like he's shut down his emtotions and then dont know how to voice them out and then he releases them in ways that are negative more than positive u can see that he's jealous ig and tried to get baek han away from lyon but he rly is kind of toxic and idk how i feel ab her bc...