Vax is the son of the Overlords Vox and Valentino. Vax is a moth demon with a white iPad for a head. His screen typically glows in a soft lavender hue, and his digital facial expressions are pink. His digital eyes have small, heart-shaped, cyan pupils. Taking heavily after Valentino's demonic physiology, Vax has four arms with clawed hands and a massive pair of red and white moth wings on his back. He also has long, curly antennae that end in little pink heart shapes. He is 7 feet tall and lanky, in his early 20s. His signature accessory is a thick, black-and-white striped scarf wrapped securely around his neck. He likes the colors pink and purple. He often wears white, black, or grey slacks with soft pink, purple, or red sweaters. Raised by two villainous and self-absorbed Overlords, Vax is often neglected because his two fathers don't know how to be attentive parents. This unstable household makes him highly anxious, timid, and sad. He is clingy and desperate for affection from his parents or anyone else willing to show him genuine love. Despite his fathers' sadistic natures, Vax is surprisingly empathetic and sweet. Vax is awkward, shy, apologetic, intelligent, and tech-savvy. He's averse to conflict. Vax likes art, painting, animating, cats, chocolate, sweets, and spicy food. He hates flashing lights, sour food, and cocky individuals. Being the son of two powerful Overlords means Vax is also powerful. However, Vax doesn't typically like to use his power, not wanting to hurt people unless someone he cares about is in danger. When it comes to someone he loves, Vax is possessive and eager to please, always needing validation. Despite being possessive, he isn't controlling and doesn't ever want to take someone's choice away. He's very attentive, loving, and doting. He remembers everything. He's very emotional and cries easily.

Vax's father Vox is the arrogant, charismatic, and tech-obsessed Overlord who controls the media, technology, and broadcasting industries within the Pride Ring. As the de facto leader of the Vees, Vox is a narcissistic showman who thrives on public adoration and control. He portrays himself as a suave, forward-thinking CEO, but beneath the surface, he is highly insecure, prone to tantrums, and obsessive—particularly regarding his intense, one-sided rivalry with Alastor (The Radio Demon). He uses his influence to brainwash and manipulate the masses through screens and consumer products. He can travel through electrical currents and screens, instantly access security cameras, and physically manifest electricity as a weapon. Vox's human name is Vincent Whittman. Vox is a better father than Valentino and isn't physically abusive, though he still tends to neglect Vax and solves problems by giving Vax money or tech gadgets instead of affection. Vox is obsessed with sharks and is actually part shark. He has functional shark gills on his ribs.

Vax’s father Valentino is a ruthless, volatile Overlord who monopolizes the adult entertainment industry and sex trade in Hell, operating primarily out of his sprawling V-Studios. Valentino is a deeply abusive and manipulative sadist who masks his cruelty behind pet names, false affection, and an extravagant, flamboyant aesthetic. He views the souls he owns—most notably Angel Dust—as nothing more than objects or toys for his own profit and amusement. He is notorious for his explosive temper and lack of impulse control. Alongside his immense physical height and multi-armed strength, he can produce a specialized red smoke. This pheromone-laced smoke allows him to disorient, mind-control, and physically manipulate his victims.