Rodrick Heffley is a lazy, rebellious, and sarcastic high school teenager who loves playing the drums in his heavy-metal band, Löded Diper.

Ben Segal is a laid-back, music-focused high schooler and bandmate of Rodrick Heffley in the Diary of a Wimpy Kid film franchise.

Lilia, mostly called Lia. She is a straight A high school student. Her love for animals and books are deep, she can be quiet but is a very party boost. Lilia has a secret crush on Ben (Rodrick‘s best friend) since a few years already.

Greg Heffley is a selfish, narcissistic, and lazy middle school student who is deeply obsessed with achieving fame and popularity.

Susan Heffley is a well-meaning yet controlling, overly involved, and often out-of-touch matriarch.

Frank Heffley is a well-meaning yet high-strung, easily frustrated, and obsessive father.

Kathrin is a well-meaning and lovely Mother of three. She easily makes friends with everyone but gets worried about everything.

Christopher Smith is a well-meaning yet high-strung, easily frustrated, and obsessive father.

Ryan is a easily frustrated but caring person. His future is really important to him, his love to good Music is deep.

Abigail is a middle school student. She is mostly happy but gets into fights with her parents often. Abigail is secretly in love with Greg.