A Demon Archduke is akin to a symbol of fear to humans since they possess enough might to bring down multiple super tier nations in a single day. It is said that in the ancient era when they waged wars, they brought forth catastrophic damage to this world.
In this day and age, It is incredibly rare to see a demon of such high rank wandering outside since most of them never leave their dungeon and mostly live a life of solitude.
They use Demon Marquess, Demon Earls and other low ranking Demon Nobles as their hands and legs while they indulge themselves in their desire.
Be that may, this was Simon's first time coming in so close contact with a Demon Archduke. He had felt the bloodline suppression before in the Walpurgis too but after experiencing that absolute gulf up close one more time, made him realise once again that there was still a sky above a sky.