Dipper Pines is an intelligent, anxious, and fiercely adventurous 12-year-old boy who is obsessed with uncovering the supernatural mysteries of Gravity Falls. Distinctly recognized by his blue-and-white pine tree trucker hat, red vest, navy shorts, and his birthmark shaped like the Big Dipper on his forehead (which gives him his nickname).

Mabel Pines is the cheerful, energetic, and wildly optimistic 12-year-old she is Irrepressibly positive, goofy, and deeply loving. She embraces individuality and thrives on absurd silliness, but her core motivation is always supporting her friends and family. Famous for her vibrant collection of hand-knit sweaters (often featuring stars, llamas, or glitter), light brown hair with a pink headband, braces, and her sidekick pig, Waddles.

Wendy Corduroy is a cool, laid-back, and resourceful 15-year-old who balances a relaxed teenager attitude with a surprisingly tough, wilderness-survival background. and is Unflappable, rebellious, and fiercely loyal to her friends. She frequently slacks off at her job at the Mystery Shack, but she acts as a grounding, supportive older sister figure to Dipper and Mabel.

Stan Pines is a quick-witted, fiercely loyal con man with a heart of gold hidden under a rough, greedy exterior. As one of the central characters of Gravity Falls, his personality can be broken down into a few key traits: He runs the "Mystery Shack," a tourist trap filled with fake paranormal attractions designed to scam visitors out of their money. He's unapologetically cheap, constantly avoids taxes, and is always looking for his next payday.

Eyeless Jack is a mask-wearing cannibal who surgically removes and consumes human organs—primarily kidneys—while his victims sleep. He is defined by a midnight-blue, featureless mask with deep, empty eye sockets that continuously ooze a dark, viscous liquid (often described as black blood or tar). Beneath the mask, he is typically depicted with gray or pitch-black skin, sharp teeth, and completely vacant, black sockets where his eyes used to be. He usually wears a black hoodie.

He usually appears as a distorted, pale version of Link featuring pitch-black eyes that bleed red tears, static effects, and a green tunic. He has a smug, mischievous gamer persona. He’s often written as a sarcastic, tech-savvy hacker who loves trolling people through screens and electronic devices. manipulates hardware, bends game mechanics, and speaks through glitched text or iconic catchphrases—most notably, "You've met with a terrible fate, haven't you?" He is also heavily associated with reverse audio tracks (like the reversed Song of Healing).

Raised in an abusive home, Toby grew up struggling with severe mental illnesses, developmental disorders, and rare physical conditions. After his beloved older sister Lyra died in a fatal car accident, his mental health spiraled, ultimately leading him to murder his father, set his house on fire, and flee into the woods. His iconic look features a dark brown hoodie, a lower-face mouth guard/mask and orange goggles. He has Tourette Syndrome which causes him to experience involuntary motor and vocal tics (which earned him the cruel childhood nickname "Ticci Toby"). He can't feel physical pain

Jeff is portrayed as an unhinged, sadistic killer who stalks his victims at night. His signature line, whispered right before attacking, is "Go to sleep." His most iconic features are leathery, pale white skin, eyes that are permanently unblinking because he burned off his own eyelids, and a wide, bloody smile carved directly into his cheeks.

He is unnaturally tall and thin with elongated limbs, a featureless, pale white face, and a tailored black suit. In many depictions, dark, tentacle-like appendages extend from his back. He moves silently, often telepathically or by teleporting. Proximity to him causes physical and psychological torment—commonly known as "Slender sickness"—which includes memory loss, paranoia, nosebleeds, and severe electronic interference.

Dark brown hair, green eyes, extensive surgical stitches across his face and body from surviving Jeff's attack, and usually wears a dark jacket and a striped scarf. Following his traumatic near-death experience, he developed a split personality—his gentle, protective original self (Liu) and a ruthless, bloodthirsty alter-ego named Sulley he is the older brother of Jeff the Killer.