The protagonist, and the reincarnation of King Solomon, though he seems to have no recollection of his past life. Currently, he is the orphaned son of a British noble family reaching past that of the royal family. He considers himself a realist, and maintains lofty dreams of high class society for his future. He has been the top of his class three years running at Stratford School and is also a 5th-year prefect there. He retains an ability to negate demonic powers the 72 pillars as Solomon's reincarnation. As a descendant of Solomon, and as the one who hold Solomon's soul, William is the "elector," the human with the ability to choose the next temporary emperor of Hell while Lucifer rests. He constantly worries about how to pay for his school fees with his considerable financial situation.