Imperator Furiosa = Mad Max
She was the Mad Max character. This was one of the first gender replacements of established white male characters. They did it in a tricky way, though.
Imperator (a Roman leader, implying one who has maximum powers, also Maximus, Max for short.)
Furiosa (Furious = Mad.)
They just had the male Mad Max standing around doing nothing because they were afraid to just go all out full female remake.