Hydrate

Known as the "Dark Emperor", he is the leader of the Reverse Maruhage Empire that exists underground beneath the castle of the real Maruhage Empire.

Hydrate is a man with long blond hair, and a small, yet semi-pointed nose. Like Bo-bobo, his goal was to take down the Maruhage Empire, but he is extremely ruthless about it, and is willing to do or take anything in order to reach this goal. On a further note, he also planned on taking over the entire world after the Maruhage Empire was defeated. He comes off as very prideful as well, as he did not believe that anyone would be able to defeat, or for that matter, reach him.

Hydrate is also the younger brother of Tsuru Tsurulina IV, forced into the shadows due to his brother becoming the emperor of the country.