Tetsurou Hoshino is the main protagonist of the anime series 'Ginga Tetsudou 999' (Galaxy Express 999). He is a courageous and determined young boy who dreams of obtaining a mechanical body to avenge his mother's death and escape the hardships of his life. Boarding the Galaxy Express 999 alongside the mysterious Maetel, Tetsurou embarks on interstellar adventures, growing emotionally and philosophically as he encounters various people and planets, each with unique lessons and challenges.