Fisher was born in the Western Australian town of Beverley. She is a great-granddaughter of George Miles, a long-serving former member of the Western Australian Legislative Council, and a niece of former Nuclear Disarmament Party and Greens WA Senator Jo Vallentine.
Fisher's ancestry includes her birth in the Western Australian town of Beverley. She is connected to George Miles, a long-serving figure in the Western Australian Legislative Council, and Jo Vallentine, a former senator with ties to the Nuclear Disarmament Party and Greens WA.