An Italian astronaut known for his easygoing, level-headed nature and sense of humor. He provides critical insights by connecting his work in space to broader existential themes.

One of the Russian cosmonauts, driven by the ambition to travel to the moon. He is a thoughtful crew member, moved by the profound nature of space experiments involving human cells.

An American astronaut recognized as the "soul" of the crew due to his deep faith in God. He grapples with the meaning of his work in space in light of his spiritual beliefs.

A British astronaut whose space ambitions were sparked by witnessing the Challenger disaster. She faces her fears through spacewalks and compares them to her hobby of freediving.

A Russian cosmonaut and the current mission commander of the station, known for his dexterity and skill in operating machinery. He experiences loneliness despite fulfilling his life's ambition to be in space.