Main character of Shinrabanshou's 2012 storyline, Daimaou to Yattsu no Pillar. As the leader of the Vice demon clan and demon lord of the land of Solomon, he was sealed away by human heroes, but without his power to keep other demons in check the land fell to chaos. Reawakened in the form of a child, Ark fights to regain control and bring peace back to his land.
While Ark is able to retake his old form and throne, he loses his power again in the 2013 storyline, Kuja Senran, while fighting the Jashingun demon swarm invading Solomon. He takes on the role of mentoring the new main character, Apollo, until he is able to regain his strength once more.
Ark wields the two demon swords Gram and Tyrfing, and his special ability is the Ark Strash. When disguised as a human girl, he goes by the name Ako.
