Kagetane Hiruko is an antagonist who works alongside his daughter, Kohina Hiruko, as his Initiator. He has slicked-back hair that reaches to the back of his neck and wears a white mask covering his entire face except for portions of his jawline. His most notable accessory is this mask, which features a mischievous smirk running from its cheekbones down to slightly above his jawline and arching back up to his opposite cheekbone. The mask has two crescent-shaped spots flowing downwards, forming an eerie portrayal along with the mouthpiece. Kagetane's upper body is covered by a connected jacket with three buttons on either side, which exposes a plant-like design on its inside and several diagonal lines on higher areas. The jacket ends in a split cape that elongates to his feet. Underneath the jacket, he wears a white shirt with many buttons and a small collar, as well as a bow-tie around his neck. His lower regions are covered by pants featuring multiple lines jutting downwards. Kagetane covers his hands with white gloves and wears a magician's hat on top of his head.
After the defeat by Rentaro, he joined Rentaros team during the fight with Aldebaren.