Hari (played by Natalya Bondarchuk) is a protagonist in Solaris.
Psychologist and Kelvin's deceased wife, manifested by Solaris as a physical replica. Kris Kelvin (played by Donatas Banionis) is a protagonist in Solaris.
Psychologist investigating the mysterious oceanic planet Solaris and its psychological effects. Henri Berton (played by Vladislav Dvorzhetsky) appears in Solaris.
Retired pilot who witnessed Solaris phenomena, now advising the mission from Earth. Kelvin's Father (played by Mykola Hrynko) appears in Solaris.
Elderly man living in isolation, reflects on past regrets and family history. Dr. Gibarian (played by Sos Sargsyan) appears in Solaris.
Researcher whose suicide triggers Kelvin's journey to the space station. Kelvin's Mother (played by Olga Barnet) appears in Solaris.
Deceased or absent mother figure, part of Kelvin's family background. Henri Berton's Son (played by Vitalik Kerdimun) appears in Solaris.
Son of the retired pilot, part of Berton's family life on Earth.