Dantalion is a candidate who wishes to succeed the throne of the demon world. He's the 71st of Solomon's 72 Pillars and the Grand Duke that leads 36 armies of Hell. He first meets William when he confronts him, saying that he finally found the "one who has Solomon's soul." It's revealed in the first chapter that he has some kind of contract with King Solomon.

Special Skills: Illusions, mind reading, and the ability to create imitations of humans.

(Source: Taken from Isaac's Undercover Section part of the extras from volume 1)

The story revolves around William, an aristocratic family's progeny with rare intellect. One day, his uncle lost his possessions after his business failed. Fearing that his family's name has been tarnished, William returns home and searches with his family's butler for anything that can be converted into cash. A search of the premises yields an underground room left by an ancestor. In the room is a magical seal, and William unintentionally summons a devil. The summoned devil tells William his name Dantalion, and reveals that William is the designator who can choose the acting ruler of the demon world.
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(Source: Anime News Network)

__Height:__167 cm  
__Hobbies:__ Billiards, drawing, remaking clothes, singing  
__Skills & Abilities:__ Waking up early    

[Profile (Lantis)](https://www.lantis.jp/artist/terashimatakuma/) | [Twitter](https://twitter.com/Terashima_dayo) | [Youtube](https://www.youtube.com/channel/UC2XXSJBvNygj81VPOJmCu-g)

His debut album "New Game" came out on June 6, 2012. Announced marriage with voice actress [Satomi Satou](https://anilist.co/staff/101560/Satomi-Satou) on July 6, 2017.

After the failure of his uncle's business, the brilliant realist William Twining finds himself penniless. To make matters worse, demons appear before him, insisting he has the power to appoint the next King of Hell! The demons offer to pay his school tuition in exchange for his help. While his principles as a staunch realist prevent him from believing in them, how can William resist such a generous offer?<br><br>(Source: Seven Seas Entertainment)