Suiyan
I like the subtle ways in which we are discovering things, like the escape tunnel that took three years to make. It's more fun that it is revealed as having taken years to complete, with no clear message that Roan had instructed them to start working it, and we come to know later that he is the one who saw and planned far ahead. That writing style makes all of Suiyan story a delight. not everything needs to be said in words.