The Earl of Millennium is the story's main antagonist. He is the patriarch of the Noah Family, and his Noah name is Adam.

The Earl resembles a grotesque caricature of a Victorian gentleman. A rotund figure, he has sickly gray skin and usually dresses in a large coat and top hat, with an enormous grin that remains fixed even when he is speaking and even eating, and his eyes permanently hidden behind a pair of pince-nez spectacles. Occasionally they have been seen; in the first few appearances, he appeared to have slitted pupils, but this has not been repeated in later installments. He wears a different hat in each encounter, each with a different decoration. In a gag comic in Volume 2 of the manga, he is shown taking off his hat, and having another set of bunny ears. Recently he has revealed two devil horns under his hat. He can be mistaken for being actually quite friendly looking in the manga as he is seen in a darkly comedic light, due to his smile and otherwise flamboyant way of speaking. He is almost always "happy" in appearance and never stereo typically "frightening", except in chapter 134 when he exhibits extreme rage at the loss of his Ark due to the previous actions of The 14th. Recently this form has gone through minor changes, the most notable is that when in this form The Earl's face is shorter and rounder.