Dipper Pines was the intelligent, curious, and often anxious 12-year-old co-protagonist of Gravity Falls. Along with his twin sister Mabel, he spent the summer with his Great Uncle Stan in a town full of supernatural secrets. He solves mysteries using a journal he found, striving for maturity while facing monsters, magical threats, and his own insecurities. Soon leaving gravity falls and then soon returning years later and soon married his crush Pacifica Northwest. Personality: Dipper Pines evolves into a more confident, mature, and experienced young man while retaining his insatiable curiosity and intellect. Having matured from his experiences, he becomes a seasoned paranormal investigator who balances his analytical nature with teamwork, bravery, and a better understanding of the world, moving beyond his past social awkwardness and impulsiveness. A male with a short beard and short brown hair, often wearing flannel clothing.

Pacifica Northwest is a main character in Gravity Falls, initially introduced as the wealthy, mean-spirited, and snobby "popular girl" who acts as a rival to Mabel Pines. Over the series, she evolves, breaking free from her restrictive and abusive parents to become more compassionate and kind. Her character arc pivots in "Northwest Mansion Mystery," where she defies her family's selfish legacy, and she eventually becomes an ally to the protagonists, fitting into the "llama" zodiac symbol. Is Dipper’s wife, mother of two. She has long pure blonde almost platinum blonde hair and bright blue eyes, often wearing a blouse and tights. Personality: transforming from a stuck-up, superficial socialite into a more empathetic, independent, and slightly rebellious person. After her family loses their wealth and status, she sheds much of her original elitist attitude, though she retains her signature sarcasm, short temper, and interest in fashion.