The Millionaire identity is shared by a collective of crime-fighters operating throughout the globe, each clad in the same green and gold costume reminiscent of the colors of currency. These vigilantes, no matter where they are found, take a no-nonsense approach to their trade-- preferring to shoot first with their specially-engineered concussive pistols and ask questions later, often disappearing from the scene without a trace.
Millennium City's Millionaire is Winston Grand, a self-made tycoon deeply involved with dealings in the science-technology sector. Essentially set for life from his earnings and wanting for nothing (except maybe someone to settle down with), Winston's circumstances couldn't seem any brighter than they are-- a stark comparison to what his life was really like.
In fact, everything about the current existence of a man known as "Winston Grand" is a fabrication: by all rights, he was killed at the age of 26* in a petty robbery gone wrong.
Brought up in poverty, the bright Winston was forced to grow up quickly and take charge of his family while his parents languished in addictions and debt. Looking for a way to supplement his meager income (most of which went to supporting his parents), he began to take a secret interest in the stock market and bought his first shares in Viva-Tech*, a bioengineering firm owned by his previously unknown uncle, Benjamin Grand.
The two would meet for the first time only a short while before Winston was murdered. Feeling responsible for all that happened, Benjamin riskily diverted funds and equipment from his own company to personally oversee the creation of a simulacrum in the likeness of his late nephew-- and to give him the life that he should have had.
It was only the beginning.