Born during the Spanish Civil War, Frankie is a highly gifted guitarist whose life is deeply shaped by tragedy and extraordinary musical brilliance. He possesses six magical guitar strings that turn blue when he alters someone's fate. His deep passion for music guides him from war-torn Spain to America, shaping his profound connections with others while he struggles to separate his true art from commercial fame.

An immortal, ageless personification of musical talent who serves as the narrator of Frankie's life. Formless but observant, Music is drawn to Frankie at birth and remains a constant, unseen presence throughout his journey. Music views human connections as "bands" and interprets life through a melodic, rhythmic perspective.

A beautiful, free-spirited girl with a tragic past whose father was a spy and whose family life was fractured. She shares an intense, immediate bond with Frankie after they witness soldiers burying bodies in the woods. Her love for nature and genuine connection grounds Frankie in his chaotic life.

A highly religious, simple sardine factory owner who views finding Frankie as a divine miracle. He is a deeply loving and devoted father figure who sacrifices his own resources to ensure Frankie receives proper musical instruction when he recognizes the boy's innate talent.

A blind, talented Spanish guitarist and former nightclub performer whose life was devastated by the Spanish Civil War. He is a strict and demanding teacher who insists Frankie learn English to prepare for the changing world. He forms a deep, fatherly bond with his young student.

Frankie's mother, a resilient woman who protects her infant son during a violent church raid. Her soothing humming of Francisco Tárrega’s music instills a lifelong connection to melody in her son before she tragically passes away.

A desperately poor nun who takes over Frankie's care after his mother's death. Struggling to survive and unable to soothe the ceaselessly crying baby once he hears music, she becomes overwhelmed by her desperate circumstances.

A musician in Spain and an associate of El Maestro. He assists El Maestro in running errands and navigating the war-torn environment when matters become increasingly dangerous.

A famous gypsy guitarist who takes an interest in Frankie. Traveling to America for a tour, he brings the young boy along, providing him with mentorship and a gateway into the broader world of professional music.

A legendary bandleader traveling by train to Cleveland and Detroit. His tour provides Frankie with crucial exposure to American jazz and the broader music industry.

A talented jazz trumpeter who befriends Frankie in Detroit. He provides the young musician with a space to play, observing Frankie's extraordinary, life-saving musical abilities firsthand.

Marcus's brother, who takes Frankie in and attempts to act as his manager. He struggles with health issues and navigates the racial prejudices of the 1950s American South.

A renowned musician who crosses paths with Frankie at a car dealership. He recognizes Frankie's profound talent and offers him cynical but realistic advice about the music industry.

A music agent and record executive who manages Frankie's career. He is highly focused on marketability and commercial success, often pushing Frankie to prioritize singing and dancing over his beloved guitar playing.

Aurora's sister and a retired mathematician. Unlike her free-spirited sibling, Cecile values proper decorum and stability, representing a grounded contrast to Aurora's turbulent lifestyle.

An unusual, fiercely loyal animal with a seemingly supernatural lifespan determined by need rather than years. The dog acts as a guardian to Frankie, appearing during pivotal moments of isolation and danger to offer comfort and guidance.

A young musician who tracks down Frankie. Ambitious and eager for success, he is initially focused on the marketability of playing with a legend before learning deeper lessons about artistic integrity.

A young girl who is a constant, joyful presence in Frankie and Aurora's later life. Initially thought to be deaf, her deep responsiveness to Frankie's guitar playing reveals her own profound connection to music.

An employee at Baffa's factory who attempts to protect Frankie by lying to the police about Baffa's whereabouts when authorities arrive.

A great historical Spanish guitarist born in Frankie's hometown. His famous composition, "Lágrima," becomes a recurring motif in Frankie's life, and the two musicians share similar tragic backgrounds and virtuosic talent.

A popular actress who becomes romantically involved with Frankie. Their relationship is heavily promoted by Frankie's management to boost his public profile, representing the superficiality of his commercial success.