King of Despair

King of Despair (絶望王, Zetsubō-ō), real name William MacBeth, is one of the Thirteen Kings. He is the older brother of White and introduced himself as Black (ブラック, Burakku).

Appearance
A young man with short blonde hair and blue eyes, as Black, he wears a black hooded jacket, and round glasses. While as the King of Despair, has a long overcoat, messy, pushed back hairstyle, and eyes turned blood red.

Personality
As Black, he is a fairly talkative person with a sweet and caring nature, he is also a rather awkward individual. As The King of Despair however, he change into a laid back, cunning, bad boy-esque type personality, with little respect for others.

Plot
He first appears in Episode 1 spying on Leonardo Watch. Several days later, he approaches Leo again on the subway, talking with him about the population within Hellsalem's Lot while also warning him about the Blood Breed. He seems to have a friendship (is acquainted) with The King of Depravity.

In Episode 11, William's and Mary's past is revealed and that he is the only child, which inherited his parent's powers as psychics. Mary did not inherit any special power. During his time in school he often got bullied, but refused to use his power due to a little accident in his past which he feels bad about. He swore to himself that he will not use his power until he gets stronger. Later, he and Mary are seen in front of the same being which took Leo's sisters eyesight. In light of the situation he offers his body to save and protect his sister from being possessed, thus, turning him into the King of Despair.

After having White lure Leonardo to the church, she place a device over his eyes in hopes that she will get his brother back. He is seen dragging Leonardo down into the other world after being knocked out by the device on his eyes. The King of Despair uses the device on Leonardo's eyes to destroy a seal, setting off explosion in Hellsalem's Lot in the process.

At the end at the church he is seen sitting next to an unconscious White. He then proceeds to point a gun at her chest and shoots. However it is not shown that Mary took the bullet to the chest and died.

Power & Abilities
As Black, he possess psychic powers as seen when he stopped a coffee jug from spilling on Leonardo but it seems he can only use this for a limited amount of time.

King of Despair is shown to be much more powerful, and more in control of his power. His power makes him able to kill without even a single touch.

Trivia

 * He shares the same seiyū as White.