The story of Addie Vochs begins in 1901.

A Century Baby born a year late, she was born to a poor black family in the deep south. On the day of her birth alien beings known as Fever Men descend on her house and take her prisoner, presumably slaughtering her family.

The Fever Men, beings of living "ideas" (psychic energy, presumably) were sent by Chimaera, an interdimensional army, to subdue this woman who was destined to become "the voice of the people". And so they kept her in a state of normal-humanity for a century, imprisoning her there in her house.

While The Monarchy was being formed, Prof. Q and Synergy travel to Addie Vochs' house to awaken her latent Century Baby powers. After the Fever Men attack and kill Professor Q, Synergy still manages to succeed and in the awakening of her powers she heals Q and destroys the Fever Men who had tormented her for a century.

At first reluctant to join The Monarchy and risk life and limb, she was convinced (albeit in a fairly heavy handed way) to join their battle against Chimaera.

Vox Populi is a Century Baby and so one assumes the normal powers seen in her kind--enhanced strength and durability, immortality--exist in her. Mainly though Vox's powers revolve around her voice, the literal voice of the people. She can heal or kill with her voice, creating healing songs or devastating cacophonies at will.

It is unclear if the history of Addie Vochs is still canon after the revelations of Jackson King and the events of Captain Atom: Armageddon.