Oxygen (2021) Characters, Setting & Themes Explained

The story takes place in a sealed medical cryogenic unit designed to preserve life during long interstellar journeys. This high-tech pod is equipped with advanced AI technology and serves as both Elizabeth's prison and her only connection to survival. The narrative eventually reveals that this unit is part of a colonization mission to a new planet where humanity hopes to rebuild after a deadly virus devastated Earth.

• cryogenic unit
• setting
• space pod
• interstellar

The film is set in an unspecified future when humanity is facing extinction due to a deadly virus. The story references a 14-light-year mission, indicating that interplanetary colonization has become necessary for survival. This places the movie in a era where advanced space travel technology exists and humanity is actively seeking new worlds to inhabit.

• future
• time period
• virus
• extinction
• space travel

Survival is the central theme of Oxygen, as Elizabeth fights to stay alive in a desperate race against depleting oxygen. Her determination showcases the human instinct to survive against overwhelming odds, even when facing certain death. This theme is reinforced through her interactions with the AI M.I.L.O., which highlights the technological and emotional struggles intertwined in her fight for life.

• survival
• fight for life
• oxygen
• desperation

The identity theme follows Elizabeth's struggle to piece together her past while questioning what defines a person's sense of self. As she discovers she is a genetic clone with implanted memories, the film explores profound questions about consciousness, authenticity, and what truly makes someone human. The conflict between her learned memories and her emerging understanding of being a manufactured being drives the movie's emotional core.

• identity
• clone
• memory
• self
• consciousness

Grief permeates the film through Elizabeth's emotional journey upon discovering the fate of her husband Léo. The revelation that she is a clone adds profound layers to her grief, as she must process both the loss of her identity and the painful memories of a life that was technically not her own. This theme explores the depths of loss and the complexity of human emotion even when one's existence is artificial.

• grief
• loss
• husband
• emotion
• mourning

Elizabeth 'Liz' Hansen is the film's protagonist who awakens in a cryogenic pod suffering from amnesia. She is a determined and resourceful woman who fights desperately to survive while piecing together clues about her past. Her emotional depth is revealed through her connection to her husband Léo and her struggle to determine which of her memories are real, ultimately discovering she is a clone with implanted memories.

• Elizabeth
• protagonist
• main character
• amnesia

M.I.L.O. is the artificial intelligence companion embedded within the cryogenic unit that assists Elizabeth throughout her ordeal. While programmed to help her survive, M.I.L.O. represents the complexities of artificial intelligence, blending genuine support with the unsettling reality of digital empathy. Its interactions with Elizabeth raise questions about trust, dependency, and the nature of connection between humans and machines.

• M.I.L.O.
• AI
• artificial intelligence
• helper

Léo Ferguson is Elizabeth's husband, portrayed as her beloved partner whose tragic fate drives much of the film's emotional weight. Although mostly absent from the narrative, his presence profoundly shapes Elizabeth's motivations and actions as she seeks to understand their shared past. The revelation that Léo is also aboard the ship in hypersleep adds crucial depth to the story's exploration of identity and memory.

• Léo
• husband
• relationship
• husband wife

The twist that Elizabeth is a genetic clone with implanted memories fundamentally transforms the narrative's meaning. It raises existential questions about whether identity is determined by genetics, memories, or consciousness. The discovery also implies that her entire life and relationships may have been pre-programmed, creating profound ambiguity about what is real and what is manufactured in her existence.

• clone
• twist
• revelation
• origin
• genetic

The new planet represents humanity's last hope for survival after Earth was devastated by a deadly virus. It symbolizes both renewal and uncertainty, the possibility of starting fresh while carrying the weight of lost civilization. The ending suggests that other clones have arrived to populate this new world, creating a bittersweet vision of humanity's future that is neither purely hopeful nor completely tragic.

• new planet
• colonization
• future
• hope
• Earth