King is a member of the Seven Deadly Sins known as the Grizzly's Sin of Sloth. His real name is Fairy King Harlequin (妖精王ハーレクイン Yōsei-Ō Hārekuin), having once been the recognized king of the fairies who deterred all who would try to invade their territory. Despite his suspicions of humans, who grew interested in their culture, but soon found himself going to war with numerous kingdoms who were after the Fountain of Youth nested within the Fairy King's Forest. However, he was eventually overwhelmed and struck from behind, causing him to become an amnesiac who forgot his responsibilities and instead took care of a young Diane, later falling in love with her. Hundreds of years would pass before he would regain his memories, leaving him oblivious to his friend Helbram's mass slaughter of human