Just like its overarching Star Wars universe, The Mandalorian has a habit of dangling loose plot threads only to neatly tie them up sooner or later.
And unless your introduction to the Star Wars universe began with The Mandalorian, you will know right off the bat that they are the real deal.
She is a Mandalorian who resided on the planet Mandalore and went up against Darth Maul to free her homeland.
Before The Clone Wars, the Mandalorian culture had, more or less, achieved peace and given up on their penchant to battle and use force to fulfil their mission.