Justine was adopted by Victor’s mother when she was twelve. She later became the servant of the household until Victor’s mother died. Justine was loved by her father but upon his demise, her mother treated her cruelly and favored her other children more. Victor’s mother could not stand the ill treatment of the child and so decided to make her a member of her own family where she also worked.
Justine took care of William, Victor’s little brother who was later killed by Victor’s monstrous creation. The monster killed William when the family was on an outing. It then placed a picture of William’s mother in Justine’s pocket. Justine was accused of killing William because the picture was given to the boy by Elizabeth earlier on during the day before his gruesome murder. Justine confessed to the said murder through coercion by the confessor. Despite Victor’s knowledge of the actual killer, he was unable to vindicate Justine and eventually she was hanged.