She was portrayed by Tina Turner.
Aunty Entity was a ruthless ruler of a post-apocalyptic town known as Bartertown. She was an Amazon-like woman who ruled with an iron-fist but found herself being challenged by Master Blaster. Aunty Entity is enraged at this but is unable to publicly oppose the duo of "Master Blaster" due to Master being the only one who knows how to work all the machines that keep Bartertown running.
To this end the she manipulates "Mad" Max into a gladiatorial battle (known as the "Thunderdome") against Blaster with hopes Max will kill him, a convenient means of exacting political assassination without being caught.
Max manages to defeat "Master Blaster" in combat but refuses to kill him when he realizes after knocking his helmet off, that he suffers from mental retardation- Aunty Entity is enraged and has Blaster executed before invoking the harsh law of "bust a deal, face the wheel" upon Max.
This ritual puts punishment at the hands of chance - much like a wheel-of-fortune as it is equipped with an arrow that will eventually stop at a number of punishments: Death, Hard Labour, Acquittal, Gulag, Aunty's Choice, Spin Again, Forfeit Goods, Underworld, Amputation, and Life Imprisonment. Max receives Gulag and is then exiled.
Max returns to the outskirts of Bartertown with a group of children and together they go in search of Master, the dwarfish Master has been reduced to little more than a slave by Aunty Entity due to the death of his protector, Blaster - Max and the children free him. Bartertown's methane factory becomes damaged and explodes.
After a lengthy chase, Aunty catches Max, but ultimately lets him go, having earned her respect.