Taryn works in a Manhattan fabric store, specializing in finding and matching discontinued textiles. She lives above the shop with her young daughter and maintains a quiet, tightly controlled routine. A recently published photograph from the World Trade Center attacks forces her to confront memories she actively suppresses.

Clara is a dedicated nurse who left her Pennsylvania hometown seeking the vibrancy of New York City. Following the Triangle Shirtwaist Factory fire, she retreats to Ellis Island to care for quarantined immigrants. She isolates herself from the mainland entirely to avoid processing the grief and horror she witnessed from the ground below the burning building.

Edward works as an accountant at the Triangle Shirtwaist Factory in the Asch Building. He is charming and friendly, quickly drawing Clara's attention during their brief encounters. He represents the lively New York future Clara envisioned before the industrial disaster.

Ethan is a physician working on Ellis Island who quickly notices Clara's professional skill and personal isolation. He possesses a gentle persistence, encouraging those around him to face their fears rather than hide from them. He takes an immediate personal interest in Clara's well-being.

Dolly is a practical, outgoing nurse who shares a room with Clara. She enjoys socializing and tries to pull Clara out of her self-imposed isolation. Dolly speaks her mind directly and refuses to indulge romanticized fantasies about the past.

Andrew is a Welsh tailor immigrating to New York to join his brother's business. He contracts scarlet fever during the transatlantic crossing and enters the Ellis Island isolation ward. He carries deep sorrow over losing his new wife during the voyage.

Lily is a woman fleeing an abusive marriage in the United Kingdom. She marries Andrew shortly before their ship departs for New York, bringing along a trunk of personal items and a distinctive marigold scarf. She dies of illness before reaching Ellis Island.

Mick is a florist working in Lower Manhattan. During the chaos of the World Trade Center collapse, he takes immediate action to shelter bystanders in his delivery van. He acts with quick, decisive concern for strangers during the crisis.

Chester works as a private investigator hired to locate missing property. He uses intimidation tactics to extract information from hospital workers. He pursues his targets relentlessly across New York.

Kent is Taryn's husband and Kendal's father. He works in an office building but agrees to meet Taryn at the Windows on the World restaurant on the morning of September 11.

Kendal is Taryn's nine-year-old daughter. She grows up knowing very few details about her father or her mother's presence in Lower Manhattan on the day he died.

Celine owns the fabric store where Taryn works. She supports Taryn professionally and personally, though she occasionally inadvertently triggers Taryn's trauma by sharing news articles.

Angus is a wealthy, abusive man from whom Lily desperately escapes. He utilizes his resources to hire investigators to track down Lily and recover items he claims she stole.

Nigel is Andrew's brother who lives in New York. He runs a tailoring business and waits for Andrew to recover from his illness on Ellis Island so they can work together.

Mrs. Stauer is a client who stays at a Manhattan hotel. Her request for a fabric consultation alters Taryn's morning schedule on the day of the World Trade Center attacks.

Henrietta is Clara's sister. Unlike Clara, who seeks intense color and adventure in New York City, Henrietta prefers the safety and predictability of their rural hometown.

Ivy is a nurse working on Ellis Island. She pays attention to the interactions between the doctors and nurses, occasionally bringing up sensitive topics without realizing the emotional impact.