Magnolia was the fiancee of Colonel Beaureguard, She lived long ago and is now deceased.
History, Early life: She was going to marry Colonel Beaureguard on the delta queen,but she left him standing at the altar when she thought he had stolen her emerald necklace. In fact, the necklace was stolen by the captain of The Delta Queen, a rival for her affection,and hidden it in the steering wheel of his ship in order to ruin the wedding.
The New Scooby-Doo Mysteries: Her real ghost appeared after Beaureguard was posthumously cleared,able to be reuntied with her lost love at last.
Appearances, The New Scooby-Doo Mysteries: Showboat Scooby