King "Bulldozer" Sin

Despite his title, King "Bulldozer" Sin, a.k.a. King Sin, is actually a Finnish duke.

Several decades ago, he had a castle built that was architecturally exceptional for being nothing but a 50-mile-long hallway separated by twenty-thousand angry face doors, with a throne room at the end. King Sin had this specially designed so that a person attempting to reach him would have to get past twenty-thousand guards hiding behind each door, ready to surprise powerbomb anyone into permanent and massive humiliation.

It is said that anyone who can brave this trial will be rewarded with the chance to kiss a ring on the duke's hand.