Through her mother's bloodline, Nina became part of a long family curse. This curse had originated with Nina's 18th-century ancestor Grigori, who had been tainted by the Darkhold, a grimoire of black magic, and was subsequently bitten by a werewolf who served Dracula. Because of this, all the descendants of Grigori were cursed to transform into werewolves upon their 18th birthday. Nina's mother, Lissa Russell, was a victim of the curse until an altercation with a sorcerer named Doctor Glitternight altered her standing and she was freed from becoming a werewolf. Lissa then married a wealthy business tycoon named Mr. Price and gave birth to Nina. Although her mother was able to alter the curse's path against her, the curse continued its course to Nina. At some point Nina was attacked and bitten by a vampire, who attempted to turn her into one of the undead. This attack altered the curse for Nina somewhat and caused her to exhibit traits of both werewolves and vampires. By day Nina Price seems to be a normal human, but once the sun goes down she turns into a vampire. Due to the werewolf curse, Nina also transformed into a white wolf during the full moon and she used her father's money and status to reserve a zoo or park in which she would cage herself until the full moon was over and she was no longer an animal (so she would not hurt innocents). However, Nina had no problem using her supernatural abilities to harm criminals, as she found them acceptable targets for her vampiric thirsts, feeding on rapists and thieves once the sun went down.