Movie
Description
Tetsuro Hoshino was born on Earth around 2211 to Kanae Hoshino. His childhood was defined by poverty, yet the family found happiness despite hardships. He later learned, through spiritual encounters, that his mother suffered a miscarriage due to overwork. His father's identity varied: unnamed and deceased in the manga and TV series, while films revealed him as Faust, the Black Knight, whose consciousness was forcibly transferred into a mechanical body. Tetsuro never knew his father.

A pivotal moment occurred near Megalopolis Station during a blizzard. Tetsuro witnessed Count Mecha, a mechanical nobleman hunting humans, murder his mother. With her dying breath, Kanae urged him to obtain a mechanical body for eternal life. Overcome by cold and grief, he collapsed but was rescued by Maetel, a mysterious woman resembling his mother. She offered him a pass for the Galaxy Express 999 on the condition he accompany her. Driven by vengeance, Tetsuro used a gun from Maetel's hut to kill Count Mecha and his subordinates, discovering his mother's body displayed as a trophy. This act launched his galactic journey.

His initial goal was reaching the planet Great Andromeda or Planet Promethium, promising free mechanical bodies. During the journey, encounters with diverse cultures shaped his worldview. He received a warrior's gun, the Cosmo Dragoon, and a hat from an elderly woman on Titan, items once belonging to her son. These became signature equipment alongside his ragged poncho, red shirt, yellow pants, and later a green jacket and white gloves. Maetel gifted him sunglasses for bright planetary light.

Tetsuro possessed a short temper, stubbornness, and occasional recklessness, balanced by deep kindness, honesty, and a strong sense of justice. His experiences fostered significant growth. Early encounters, like the sacrifice of the glass waitress Clair who left him a tear as a memento, and guidance from the bandit Antares—who taught tactical ruthlessness—influenced him. Visits to various planets exposed him to mechanization's darker aspects, including societies where mechanical beings expressed regret or despair. On Planet Promethium, a suicidal mechanized human warned him about Maetel's true identity as the daughter of Queen Promethium, ruler of the Machine Empire, leading to feelings of betrayal.

These experiences culminated in rejecting the mechanized body he once sought. He realized eternal life often brought emptiness and complacency, valuing his human vulnerabilities and mortality instead. In the manga/TV continuity, he discarded the mechanical body catalog upon reaching Andromeda. In film continuity, he actively resisted mechanization on Planet Maetel, confronting Queen Promethium and supporting Maetel's destruction of the planet. This decision was reinforced by encounters like the confrontation with Faust, who revealed their familial connection on Great Andromeda, and witnessing the extraction of life energy from humans to power the Machine Empire, including the death of his friend Meowdar.

Years after his initial journey, Tetsuro returned to an Earth engulfed in warfare between humans and mechanized forces. Summoned by Maetel to board the 999 again, he encountered a transformed, computerized train staffed by a new mechanized waitress, Metalmena. His journey involved confronting mechanization's legacy, including the Ghost Train used to transport humans for energy harvesting. He reunited with Maetel on La Metal, her birthplace, learning of her potential ascension as the Machine Empire's new queen. During this time, he bonded with a cat-like resistance fighter named Meowdar, whose later death at the hands of the energy-draining system further solidified his opposition.

Tetsuro's relationship with Maetel evolved significantly. Initially viewing her as a maternal figure due to her resemblance, their bond deepened into a complex partnership marked by mutual dependence and conflict. Maetel admired his kindness and determination, while he sought to support her despite suspicions about her motives. Their dynamic was tested by revelations of her lineage and role, yet they remained connected through shared sacrifices. Maetel's destruction of her planet and separation from Tetsuro—boarding another train to guide a different boy—highlighted their enduring but transformed connection.

Interactions with key figures included tense but respectful encounters with space pirates Emeraldas and Captain Harlock. Harlock acknowledged Tetsuro's potential to forge his own destiny, while Emeraldas recognized his selfless motivations despite her disdain for mechanization. Both saw echoes of their late friend Tochiro Oyama in Tetsuro's traits and beliefs. These relationships, and the loss of numerous individuals met during his travels, reinforced his commitment to honoring human life and memory.

Tetsuro's appearance varied across adaptations. Early depictions featured a cartoonish, disproportionate design explicitly described as unattractive. Later portrayals, particularly in films, gave him more conventional features, aging him from 10 to 15 years. His attire typically included practical, rugged clothing suited for travel, evolving from simple Earth garments to incorporate the acquired hat and cloak. Personal habits reflected his impoverished upbringing, including poor hygiene and a dislike for bathing or haircuts, often requiring Maetel's intervention. His favorite food remained simple, affordable meals like ramen, particularly beef-flavored.