Giselle and her two sisters, Olivia and Ada, were Furies. Like her sisters, Giselle's anger led immediately to violent hatred and obsessive vengeance.
When Olivia went mad after her husband Samir was murdered, Ada and Giselle sheltered her for a time. After she died, Giselle and Ada began hunting down Bo and Olivia's rival Jenny, determined to kill them both. Giselle was caught in an explosion in Jenny's secret house, and is presumably dead.