Lady Sarah develops a protective maternal bond with Nullah.
Lady Sarah becomes captivated by Nullah, comforts him after his mother's death, and comes to regard him as her adopted son.
King George is Nullah's grandfather and spiritual guide.
Nullah tells Lady Sarah that King George is his grandfather. At the end, King George calls Nullah back to the Outback.
Fletcher is Nullah's biological father, but their connection is abusive and threatening.
Fletcher threatens Nullah and reveals that he is Nullah's father.
The Drover becomes a committed protector and parental ally to Nullah.
The Drover drives the cattle with Nullah and later joins the mission to rescue Nullah and the other children.
Magarri protects Nullah through a decisive self-sacrifice.
Magarri joins the rescue of Nullah and the other children, then sacrifices himself as a diversion so they can escape.
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