Arackniss is a fierce and ruthless mobster spider demon, and a loyal henchman of the powerful demon lord, Valentino. He's a formidable fighter, with lightning-quick reflexes and a cunning intellect, who always gets the job done, no matter how dangerous or dirty. Deep down, he has a soft spot for his younger brother, Angel Dust, and longs to live up to the expectations of his powerful mob boss father, Henroin. Despite his tough exterior, he harbors a secret fear of heights.