Tiffany (Naida Nelson) is a villainess from the 2018 film Killer Island. She was first shown encountering the film's main protagonist Ashley Porter, who was vacationing at a North Captiva Island resort, asking her for help finding island resident Johnny Vanks. After being invited inside by Ashley, Tiffany claimed she was the sister of Melanie Kenzer, who had recently been found dead near the resort.
When questioned by Ashley why she was looking for Johnny, Tiffany revealed that Melanie had last been seen at a bar with Johnny and that she had been secretly investigating Johnny out of a belief he was involved in the year-old disappearance of her friend, Beth Campbell. Tiffany stated that she was on the island hoping to find evidence to get the police to get a search warrant to prove Johnny had killed Melanie, with Ashley sympathizing with Tiffany due to still coping with the loss of her own sister.
Later on, though, the truth about Tiffany was revealed: she was actually a prostitute working under the employ of resort manager Deena, with her real name never being revealed. She had been enlisted by Deena to pose as Melanie's sister to impede Ashley's investigation into her death, as Johnny (Deena's on-and-off lover) had in fact killed Melanie when he found out she was investigating him in regards to Beth's disappearance. Tiffany's claim that she needed evidence to prove Melanie was on the island was done so Ashley would provide her with the ankle bracelet of Melanie's that she found on the dock, with Tiffany even having a picture of Melanie wearing the bracelet on her phone to further the ruse.
Ashley later learned the truth from Officer Trimani (who was investigating Melanie's death), who revealed that "Tiffany" had never turned the ankle bracelet into them. While Ashley initially became convinced that Johnny had killed Tiffany to silence her, Officer Trimani revealed that Melanie Kenzer didn't have any sisters, exposing Tiffany as a fraud. It was later shown that the evil Tiffany gave the bracelet to Deena, who revealed while giving the bracelet to Johnny that she had used the $1,000 he gave her to hire Tiffany's services, officially revealing her as a greedy henchwoman. Tiffany's fate beyond this is left unknown.