Dean Delarosa is a kid that Greg knew since third grade. When Greg was in third grade, he got invited to his birthday party, but Greg got the date a week before. Greg liked the gift that he was giving to Dean, so he on his own played with it. Dean was Greg's secret holiday buddy when the kids had give each other presents anonymously, Greg forgot, but Susan got it and gave it to Greg and Susan didn't knew that it was supposed to be anonymous so Greg and Dean felt embarrassed when the teacher called out Dean's gift's label.His Role was played by Byron Brown in the online version.
- Diary of a Wimpy Kid: Cabin Fever (First and only appearance)