Here's a breakdown of their relationship:
* Adopted: Victor's mother, Caroline, took in Justine when she was very young.
* Close Relationship: Justine and Victor grew up together, forming a close bond. She is described as being kind, innocent, and loving.
* Tragic Fate: Justine is wrongly accused and convicted of murdering Victor's younger brother, William. This event deeply impacts Victor, adding to his guilt and remorse.
* Symbol of Innocence: Justine represents the tragic consequences of Victor's actions and the destruction he unleashes upon those he loves.
Justine's story highlights the themes of innocence, guilt, and the destructive power of ambition in Mary Shelley's novel *Frankenstein*.