Mrs. Thornhill is a tourist from England, she's together with her friend Nigel on holiday in Los Santos to find used objects from celebrities. Trevor will find Mrs. Thornhill for the first time in Vinewood when Mrs. Thornhill and Nigel are searching through the garbage of a unknown household. In the last missions of Vinewood Souvenirs, the populair celebrity Al Di Napoli is getting kidnapped by Nigel, Mrs. Thornhill and Trevor.
- Nigel tells Trevor that Mrs. Thornhill has given birth to two childeren and that she is married with a male in England, not with him.
- During the storyline, the firstname of Mrs. Thornhill is unknown. She is always called Mrs. Thornhill by Nigel.
- Al Di Napoli tells Trevor when he his laying in the trunk of Nigel his vehicle that he needed to do terrible things with Mrs. Thornhill her feet.