The Skeleton Duke, perhaps, detested the undead more than anyone else in this world.
He always wore the gold mask that was proof of his position as the "Eternal Duke."
But his platinum heavy boots, white metal gloves, and the thick armor he only put back on when he entered the Dirge Singer Principality were all remnants of his past life as a holy knight.
Yes.
He had been a holy knight—battling to eradicate every undead creature in this world, striving with all his might, fighting until his last breath. That's why no one ever suspected that the Eternal Duke was actually one of the undead.
And for that very reason.
The Eternal Duke felt sorrow for himself.
Duke Midas detested the undead so much, yet he had turned himself into a pile of bones... His only purpose was to hope that the painful curse passed down through his bloodline would end with his generation.
He didn't want to pass the curse on any further.
And indeed, he didn't.