Hattie was a senior flight attendant, young and beautiful, working for Pan-Continental Airlines. She seemed to be attracted to Pan-Con pilot Rayford Steele, perhaps wanting an affair with him. (In the movie version only, during her last flight, to Heathrow Airport, she reveals that she is leaving Pan-Con for the United Nations, thanks to Cameron "Buck" Williams sending letters to Nicolae Carpathia about her.) Late into the night, many awake to find that loved ones and others have vanished, leaving behind everything material, ranging from clothes and hearing aids to tooth fillings. Terrified at the events, Hattie informs Rayford about the event, thinking he does not know what has just happened.On board the flight is future member of the Tribulation Force Cameron "Buck" Williams and Judd Thompson Jr,the eldest member of the Young Trib Force from Left Behind: The Kids. When they return to Chicago, Hattie begs Rayford to stay with her, but he refused, wanting to check on his family. A few days later she arrives at his house, pleading for him to come with her, but he tells her he found what he was missing, Jesus Christ and that the disappearances were the Rapture. However she declines, thinking he is crazy after losing his wife and son, and leaves without him.
Hattie, who convinced Buck to introduce her to AntichristNicolae Carpathia, eventually becomes the personal secretary, and later the lover, of Carpathia. Rayford and the other members of the Tribulation Force attempt to convince her that Carpathia is evil, but she refuses to listen. After becoming pregnant with Nicolae's child and being engaged to him, Carpathia attempts to poison her but the child takes the brunt of the poison and dies. Hattie is eventually sent to the Belgium Facility for Female Rehabilitation (BFFR, or "Buffer") when Carpathia realizes she would be a liability to him. She is rescued by members of the Tribulation Force. She is then convinced of the truth of God's Word, and she becomes a devout Christian. She is eventually killed by False ProphetLeon Fortunato, who calls down fire from the skies to burn her to ashes. Hattie is resurrected at the Glorious Appearing of Jesus Christ, to the great delight of Rayford and the rest of God's followers. She is awarded a crown from Jesus Himself, who praises her for her bravery in the face of certain death. She also appears briefly in Kingdom Come, as she is among those present at Mac McCullum's thousandth birthday party and is assumedly with the rest of the Trib Force as they gather to watch the end of the Millennium.