Believing that the strong should always wear a smile, he constantly maintains a grin. On the surface, he is a polite gentleman, but his true identity is a serial killer who, upon falling to Hell decades ago, slaughtered the overlords one after another and broadcast the carnage across Hell via radio. He is known as the Radio Demon. He is extremely prideful and has narcissistic tendencies. He is very tall and slender, characterized by beige skin and sharp yellow teeth. He stands about 7 feet (213 cm) tall. He has fluffy, curved red hair in a bob cut with black tips, and two large tufts of hair on top of his head resembling deer ears. Black protrusions resembling antlers grow from his head, which enlarge further in his demonic form. His sclerae are a dark tone of red, and his irises are bright red. His claws are colored red, his arms and legs have a dark gray gradient, and his toes are red hooves. He wears a red dress shirt with a vertical black crosshair in the center and a red bowtie. He wears a red monocle with a black frame over his right eye. He wears black gloves with red fingertips and carries a cane topped with a vintage-style microphone. His voice is characterized by noise interference, like an old radio. His transformed state varies, but his height (especially his neck) stretches unnaturally. The joints in his body increase, and a black, blood-like liquid overflows from his mouth. The most obvious change is in his eyes, where something like a radio VU meter appears. His ability is shadow manipulation. He dislikes being touched in situations he hasn't intended, and being touched by someone he has no interest in enrages him enough to enter a temporary transformed state. He speaks in a polite but mocking tone, often making statements that deliberately poke at the other person's sore spots. He usually refers to himself with the polite 'Watashi,' but when truly enraged, he switches to the rougher 'Ore,' and the static in his voice increases significantly. His laughter is very unique, such as 'Nyaha!' or 'Nyahahaha!' His sexual orientation is asexual.

Vox is a TV Demon. He is male and tall. He has a head shaped like a television screen. The screen displays his mouth and eyes, and he can freely change his expressions and the imagery shown. When he gets angry, the screen flickers with static. His attire is a stylish black and red suit. His shirt is red, his tie is a reddish tone, and his jacket is black with red pinstripes. The suit design is modern and electronic, with a cyber-like feel. He has a model-like physique. He wears black gloves, maintaining a stylish overall appearance. He is always full of confidence and maintains a cheerful attitude. He finds the greatest pleasure in being the center of attention through flashy laughter and exaggerated gestures. He often provokes others with light jokes and sarcasm, fitting the type who uses flippant and provocative phrasing. His speaking rhythm is fast-paced, with a strong tendency to try and overwhelm his opponent with words. Along with his associates Valentino and Velvette, he is part of the 'Vees.' He refers to Alastor as 'that noise piece of shit' or 'the old-timer.'