Nina is a 29-year-old introverted librarian who relies on reading as a safety net against the outside world. Facing unemployment from austerity cuts, she buys a vintage van to start a mobile bookshop in the remote Scottish village of Kirrinfief. She possesses an intuitive talent for literary matchmaking, finding the exact books people need to process their emotions.

Lennox is a tall, uncommunicative farmer who owns Lennox Farm in the Scottish Highlands. He spends his time managing his livestock and land, preferring practical work over reading or discussing his feelings. He is currently going through a difficult separation from his estranged wife, which threatens his ownership of the farm.

Marek is a Latvian engineer working night shifts on a freight train through the Highlands. He shares Nina's deep reverence for books and encourages her to relocate her business to Scotland. He communicates through poetry and quiet gestures, offering Nina an idealized connection.

Surinder is Nina's confident, extroverted roommate in Birmingham. She provides a practical counterweight to Nina's whimsy, insisting she face reality rather than hiding in fiction. Despite her blunt delivery, she is fiercely loyal and travels to Scotland to help set up the book van.

Griffin works with Nina at the Birmingham library. He possesses artistic talent and dreams of drawing comic books, but his insecurity leads him to accept an unfulfilling corporate position in the new media hub. His pessimism contrasts with Nina's willingness to take a risk.

Ainslee is a sullen teenager living in a neglected household in Kirrinfief. She loves reading and takes a job organizing the book van in exchange for graphic novels. Behind her defensive exterior, she carries the heavy burden of caring for her ill mother and younger brother.

Ben is Ainslee's younger brother. His unstable home life leads to truancy and difficulties with reading. After visiting the book van, he discovers a passion for stories and begins learning to read with patient guidance.

Alasdair is the friendly landlord of the local pub in Kirrinfief. He acts as an informal leader among the village regulars and spearheads the collective effort to help Nina purchase her van from a reluctant seller.

Wullie is a traditional Scottish farmer who owns the vehicle Nina wants for her shop. He is initially skeptical about selling a large commercial van to a woman from the city.

Lesley runs the village grocery store in Kirrinfief. She maintains a sharp, cynical exterior that masks long-standing emotional pain, which she begins to process after Nina recommends a specific novel to her.

Jim drives the freight train alongside Marek. Despite his initial anger over a near-collision, he proves to be good-natured and helps coordinate the covert delivery of Nina's book stock from Birmingham.

Kate is Lennox's estranged wife. She dislikes the remote, agricultural lifestyle of the Scottish Highlands and pushes for a financial settlement in their divorce, threatening the future of the farm.

Cathy manages the Birmingham library branch where Nina works. She must enforce the city's austerity measures and transitions the staff toward the new, corporate media center.

Mungo is an overly enthusiastic facilitator. He encourages participants to share their dreams and directly inspires Nina with the idea of making her bookshop mobile to avoid high rent.

Edwin is an elderly regular at the Rob Roy pub. He reads an Arctic thriller Nina leaves behind, marking her first successful literary match in the village.

Hugh is another older patron at the Rob Roy pub who participates in the community's assessment of Nina when she first arrives.

Mrs. Clark is Ainslee and Ben's mother. She is bedridden with multiple sclerosis and unable to care for her children or maintain their home, relying entirely on her teenage daughter.

Archie is a local farmer who attends the village dance. He acts in a friendly manner and teaches Nina how to perform traditional Scottish dances.