These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Brilliance: If you look closely, the series has been subtly dropping hints about Sando not being human since the very start. Her lover is a guy who can talk to animal, she doesn't need to eat, she's ridiculously strong for a country girl, no one is turned on by her incredible sexiness.. and the warriors whom she picked fights with spread the rumors that they were fighting some kind of monster.
Fridge Horror: At first the duck that Aji Tae carries around seems just part of his quirky act to fool people. But it turns out that the duck, like Mago, is actually human. A human toddler. Now think of all the people that had intentions to cook and eat him.
Ho Yay: Won Sul seems to have....strong feelings for Munsu.
Stoic Woobie: Also, the leader of the Hwalbindang. She got mistreated due to being an illegitimate child while Kye Wol Hyang was pampered, but never held any resentment towards her sister or the world, and has a strong desire to help people.