August is a 23-year-old transfer student at Brooklyn College who moves into an eccentric Brooklyn apartment on a whim. Having spent her childhood moving from city to city, she carries only five boxes of belongings and a pocketknife, preferring to travel light to avoid forming deep attachments. She takes a job waiting tables at Pancake Billy's House of Pancakes, anticipating another temporary stop in her transient life. However, she quickly learns to rely on her welcoming new roommates and develops an intense fascination with a mysterious, captivating woman she repeatedly encounters on the Q train. Her natural investigative instincts, honed during her childhood, push her to solve the mystery surrounding this subway rider.

Jane is a charismatic and enigmatic young woman who constantly rides the Q train wearing a battered leather jacket and listening to old cassette tapes. She claims to have invented the off-menu "Su Special" at Pancake Billy's but seemingly exists entirely out of time, unable to physically leave the subway cars. Despite her confinement, she exudes an effortless confidence and charm, quickly drawing August out of her isolated shell. As the two grow closer, Jane's vibrant personality and forgotten history become the central focus of August's new life in the city.

Niko is a part-time bartender and psychic who immediately welcomes August into the Flatbush apartment with open arms. He is a transgender man with a calm, grounded demeanor and an unnervingly sharp intuition about people's futures and pasts. His genuine warmth and psychic abilities quickly prove useful when August begins to encounter inexplicable, time-bending mysteries on her daily subway commute. He serves as an emotional anchor for the apartment, balancing his own relationship with a protective instinct toward his friends.

Myla is a brilliant former electrical engineer who bravely quit her steady, demanding job to pursue a less predictable career as a sculptor. She is exceptionally warm, stylish, and inclusive, deciding almost instantly to adopt the hesitant August into her vibrant life. She provides crucial emotional support and practical, scientific theories regarding the unusual electrical and temporal events happening around Jane on the Q train. Her unwavering optimism and technical background make her an essential part of the friend group's problem-solving efforts.

Wes is a quiet, observant tattoo artist who shares the bustling Flatbush apartment with August, Myla, and Niko. He frequently wears oversized flannel shirts and tends to keep his thoughts to himself, though his actions show he cares deeply for his roommates and his high-energy dog, Noodles. Having faced rejection from his own family, he creates a chosen family within the apartment. He harbors a strong but unrequited affection for the drag queen across the hall, holding back his feelings out of a deep-seated fear of eventually disappointing him.

Isaiah is a vivacious neighbor who lives across the hall from August and her tightly-knit roommates. He performs locally as a talented drag queen under the stage name Annie Depressant, bringing color and drama to their Brooklyn building. He is highly social, frequently hosting large brunch events for his chosen drag family, and maintains a strong, obvious affection for Wes. His loud, joyful presence provides a welcoming contrast to Wes's quiet nature.

Suzette is August's mother, a woman who spent August's childhood constantly moving their small family from place to place, beginning in New Orleans. She is completely consumed by the decades-old missing-person case of her brother, frequently prioritizing the investigation and its surrounding paperwork over emotional stability for her daughter. This lifelong obsession with the past has created a deep rift between her and August, who resents playing second fiddle to a ghost.

Augie is August's missing uncle who vanished without a trace in the 1970s after a severe fight with his unaccepting parents. His unsolved disappearance shapes the trajectory of his sister's entire life and instills early, reluctant investigative instincts in his niece, August. Long before his disappearance, he was known as a beloved and magnetic figure in his community, leaving behind a legacy of unanswered questions and grieving friends.

Jerry is a steadfast, long-time line cook at Pancake Billy's House of Pancakes. He is a reliable, steadying presence in the diner's hot kitchen and holds a deep, historical connection to the restaurant's early days in the 1970s. He works closely with August during her chaotic breakfast shifts, providing silent support and off-menu meals as she navigates her complicated new life.

Lucie is the pragmatic manager at Pancake Billy's House of Pancakes. She keeps the busy, community-oriented restaurant running smoothly despite looming financial threats from rising rent. She helps guide August through the chaos of her initial waitressing shifts, demonstrating a tough but supportive leadership style that keeps the diner's eclectic staff functioning.

Billy is the hardworking owner of Pancake Billy's House of Pancakes, a neighborhood staple in Brooklyn. He faces severe financial difficulties and immense stress as he struggles to keep the beloved community diner open after his landlord drastically raises the rent. His dedication to his staff and the diner's legacy makes the restaurant a second home for characters like August.

Noodles is Wes's highly energetic dog who shares the tight quarters of the Flatbush apartment. The pet brings a chaotic, joyful, and welcoming energy to the household, frequently barging into rooms and demanding attention. He serves as a comforting, grounding presence for the roommates, especially for the introverted Wes.