Rodrick Heffley is our protagonist Greg's older brother. He is sixteen years old and serves an antagonistic role in the story. One of his favorite pastimes is playing tricks on Greg, such as having him think he managed to sleep through the whole summer. He also gives Greg the same book (which Greg hates) for Christmas every year. In a third example, he once told Greg that if you bury money, a money tree will grow. After Greg had "planted his seed," Rodrick then went and took the money. It's important to note that this antagonism is based in typical sibling rivalry, and that Greg himself treats their younger brother, Manny, in much the same way.
Rodrick and his friends are in a rock band called Löaded Diaper, which appears to be relatively unpopular. Rodrick is the lead drummer, and the lead singer is a thirty-five-year-old high school dropout. It is Rodrick's parents' greatest concern that their son will turn out to be similar to the lead singer. Rodrick is a typical teenager in many ways and can sleep for hours on end when he should be working. He is lazy and careless in his schoolwork, not unlike Greg, and it is implied that he pretends to not know how to do things so that other people will do these things for him.