Known as "Hi no Tori," the Phoenix appears in "The Phoenix -Space-" as an immortal cosmic entity existing beyond conventional time and space. It manifests as a legendary bird embodying eternal life and enforcing karmic balance throughout the universe.

Within this narrative, the Phoenix curses the human Makimura for betraying and murdering bird-like aliens who sheltered him, including his alien wife. This curse forces Makimura into an endless cycle of aging backward and forward, condemning him to perpetual reincarnation without release from his suffering. The Phoenix states this punishment directly results from Makimura's violation of natural laws governing compassion and coexistence.

The entity demonstrates abilities such as telepathy, communicating directly with characters' hearts and minds. It manipulates life forces, transforming one human into a plant to sustain another being. When confronted with appeals for mercy, the Phoenix emphasizes the inevitability of karmic consequences, extending curses even to descendants of those who defy cosmic balance.

Its physical form shifts between manifestations: a radiant bird, a peacock-like figure, or abstract energy. The Phoenix perceives all existence across time and space simultaneously, referencing its role in connecting past, present, and future events within broader mythology. In this story, it returns characters to Earth or isolates them on desolate planets according to their individual karmic paths.

The Phoenix operates as an impartial force of nature, neither benevolent nor malevolent. It enforces universal laws without intervening in human choices, ensuring individuals face the repercussions of their actions. This aligns with its depiction as an embodiment of reality itself, where life, death, and rebirth form an unbroken continuum.