Trista is a girl and a minor character in the series who met Greg andRowley at the end of The Last Straw. They took her to the country club that the Jefferson's belonged to in Dog Days; but within a few minutes, she met a lifeguard, hung out with him for the rest of the time, and forgot all about Greg and Rowley. This causes Greg to disregard her. She has not been seen in the series ever since, but makes a cameo in Cabin Fever.
- Diary of a Wimpy Kid Online (First appearance)
- Diary of a Wimpy Kid: The Last Straw (First book appearance)
- Diary of a Wimpy Kid: Dog Days
- Diary of a Wimpy Kid: Cabin Fever (Cameo)
- Diary of a Wimpy Kid: Do it Yourself Book
- Which state Trista moved from remains unknown, though in the online book, Trista exclaims she came from New Mexico.
- She makes a small cameo on page 147 of Cabin Fever when the speaker calls Greg to go to Vice Principal Roy's office.
- Its unknown which house she moved in, but in the online version she moved into Chirag's old house.
- She might be go to the Westmore Middle School since she appeared in Greg's class in page 147 of Cabin Fever.