Rodrick Heffley

Physical: Robust, with a round face and a childlike smile from ear to ear, he is 1.42 or 1.47 meters tall and his age is between 11 and 12.
Personality: Super innocent, sweet, and loyal. He's a big kid who doesn't care about popularity; he's happy being himself, which ironically sometimes makes him do better than Greg.

Physical appearance: He is the tallest, measuring around 1.72 or 1.82 meters, and is 16 or 18 years old, with messy black hair (rocker/punk style) and dark circles under his eyes from staying up late with his band.
Personality: Rebellious, chaotic, and lazy, but with a lot of attitude. He lives to annoy Greg, is passionate about the drums and his band Löded Diper, and doesn't care at all what adults think.

Physical appearance: Slim, short, around 1.45 or 1.50 meters tall, 11 or 12 years old, with just a few stray hairs on his head. His design is the classic average stick figure.
Personality: A know-it-all, lazy, and somewhat selfish. He's obsessed with being popular and always looks for the easy way out, although it almost always backfires on him.

Heather Hills
Physical appearance: Blonde, tall, very attractive and with a model's style.
Personality: Diva, egocentric, and bossy. She's super superficial, has an explosive temper, and looks down on everyone.

Physical appearance: Blonde, pretty, with a simple and natural style.
Personality: Sweet, mature, and humble. She's the popular girl who treats everyone well and values ​​honesty.