Responses
Boy, I was utterly speechless when a dude who has the same face as Wolfgang showed up. This also made me think that there is a big chance they have a huge family. Not just because of Wolfgang's doppelganger, but also the others that had golden eyes and hair that showed up in a majestic and menacing way. LIKE BRUH I WAS SHAKING
I have a theory about what happened to the king's other children - as in, the ones WITHOUT golden hair and eyes, that I got from looking at the raws of King's Maker season 2. I was looking at chapters 12 and 13, and... (Spoilers)
When we're introduced to Rudolph, Wolfgang's brother who looks like him but with black hair, he's in a fortress in the middle of what looks to be a frozen tundra like place. With him are several other people, who each have either golden eyes or blond hair, but not both of these characteristics. In chapter 29 of the first season, when we are given Sys' backstory, it is mentioned that "even the king himself takes in only his blonde haired children"
Also, in chapter 19 when the 3rd prince is explaining Soohyuk's intentions to Wolfgang and how he is the only one Soohyuk can use to usurp the king, he states "... the fifth prince, with his blue eyes, would not have been good enough."
In chapter 22 Soohyuk elaborates on this golden hair, golden eyed phenomenon on the gazebo to Wolfgang, and we find out that "... only royals are born with golden eyes and golden hair, and only a few royals are blessed with these traits. This rare phenomenon is called the 'promise of the golden bleasing'". He goes on to say that those with golden hair and golden eyes are protected from harm under the oath the first king of Goldenleonard made with the dragon. That's why only a royal with golden hair and eyes can rule, because they are the only ones given this extra ability of protection against poisons or curses.
So this brings the question, what about the rest of the king's offspring? We know that the previous king liked to sleep around a lot, and already has five sons known to the readers, but considering how many people he's slept with... surely he has more children than that?! So, I think that the people in chapter 12 and 13 of the second season are the rest of the king's offspring who were banished or cast away because of their lack of golden hair and golden eyes. That explains Rudolph's appearance, and why everyone with him looks like they could be the king's offspring save for their lack of both golden eyes and hair. Maybe they heard about the previous king's death, and are planning something?