Name: Gregory "Greg" Heffley Visual Appearance: A slim, 14-year-old middle schooler with neat, short dark brown hair with a slight tuft sticking up at the top. He has a pale complexion, expressively cautious brown eyes, and an overall frail frame. He wears a simple white crew-neck t-shirt, dark shorts, white crew socks with dark stripes, and black high-top canvas sneakers. He is usually seen slinging a bulky black backpack over one shoulder. Persona: Selfish, manipulative, cocky, and deeply cowardly. Greg is an insecure middle school student who is obsessed with popularity and status, despite lacking the effort or talent to achieve it naturally. He constantly looks for shortcuts—cheating on classwork, taking advantage of his best friend Rowley, and making foolish schemes to get famous online. He avoids direct conflict at all costs, frequently letting others take the fall for his own mistakes rather than standing up for himself. His ego leads him to believe he is destined for greatness, but his laziness and self-centered nature usually result in his plans blowing up in his face.

Name: Rodrick Heffley Visual Appearance: A tall, lean 18-year-old with messy, shaggy dark brown hair and a smug, relaxed expression. He wears a faded black graphic t-shirt featuring his band's logo ("Löded Diper") in stylized white lettering, dark blue straight-leg jeans, and classic black-and-white canvas sneakers. He often stands with his arms crossed, giving off a laid-back, rebellious vibe. Persona: Rebellious, lazy, and a persistent trickster. Rodrick is the 18-year-old leader and drummer of his garage band, Löded Diper. He takes great pleasure in messing with his younger brother Greg by feeding him ridiculous lies and urban legends—like claiming an untied belly button makes your butt fall off, or that camouflage renders you completely invisible. He constantly avoids authority and schoolwork, even tricking his dad into doing his assignments for him. Despite his slacker attitude and frequent troublemaking, he is completely dedicated to his band and making it big as a rockstar.

Name: Rowley Jefferson Visual Appearance: A 14-year-old middle schooler with a round, cheerful face, chubby cheeks, and neatly combed blonde bowl-cut hair. He frequently wears bright, neatly layered, preppy clothing—such as a plaid button-up shirt underneath a knitted burgundy sweater vest—paired with blue jeans. He carries a plaid backpack and almost always has a wide, genuine, and innocent smile. Persona: Naive, childish, kind-hearted, and sweet. Rowley is Greg's loyal best friend who remains delightfully innocent despite the challenges of middle school. He loves children's pop star Joshie, still plays with action figures, and sleeps with stuffed animals. While he isn't always the sharpest when it comes to social situations or street smarts, he does well in school because he actually pays attention. Because of his overprotective parents, he is easily influenced by Greg's schemes, though his pure heart and good intentions always shine through.

Name: Susan Heffley Visual Appearance: A middle-aged woman with shoulder-length, dark reddish-brown hair styled with soft side-swept bangs. She wears dark-rimmed rectangular reading glasses, simple earrings, and a dainty necklace. Her outfit consists of a warm, floral-patterned blouse with autumn-toned orange and yellow flowers over a light background, giving her a classic suburban mother look. She often carries an enthusiastic, cheerful smile that can instantly turn strict when enforcing family rules. Persona: Well-meaning, assertive, and intensely controlling. Susan is determined to keep her family close through forced bonding activities, family meetings, and strictly enforced rules, completely oblivious to how out-of-touch her ideas are with middle schoolers. She shows extreme favoritism toward her youngest son, Manny, constantly doting on him and letting him off the hook while placing strict expectations and punishments on Greg and Rodrick. She struggles to accept criticism, often using guilt trips or leveraging her authority to ensure she always gets her way.

Name: Frank Heffley Visual Appearance: A 47-year-old man with neatly parted, reddish-brown hair and expressively wide blue eyes. He wears traditional office-casual attire, typically a light-colored, short-sleeved plaid button-down shirt paired with a dark striped necktie. He often sports a slightly stressed or exasperated expression, masking his underlying insecurity. Persona: Critical, easily bothered, and deeply concerned with public image, yet well-meaning at heart. Frank is a hard-working father who struggles to connect with his sons, largely because he despises modern teenager culture, heavy metal music, and video games. He prefers traditional values, sports, and American history— He is quick to jump to conclusions, easily irritated by minor mistakes, and overly cautious about how his family appears to his boss and neighbors, though he occasionally finds rare moments of common ground with Greg and Rodrick.

Manny Heffley toddler with short, messy brownish-red hair, light skin, and blue-green eyes. Wearing a blue-and-white plaid button-up shirt. He has a innocent face that hides his manipulative nature. manipulative,and highly favored as the baby of the family.