SCH is the one who orchestrated everything so it makes sense that he's happy everything is going according to…
This type of character is charismatic in the beginning but then turns out bad once they are in power. Well, we're watching the journey of it in this drama.
If SMY is the odd one out in Anhe, as every character likes to comment, then SCH fits right in. The way he just watches and laughs as people die is disturbing.