As a clone, Rei had been born with only the thought of fulfilling his role, but doubts began to grow within him. They say curiosity killed the cat, but suspicion will eventually kill faith. After struggling with his own doubts about Gil's ideals, Rei accidentally kills Gil. With the people he trusted and himself who trusted them dead, he has lost all meaning in life, and it is his friend, Shin, who has also lost his family and decided to fight, who takes his hand.
Shin, too, has lost Mayu, Stella, and Luna, and has dedicated himself solely to destroying all acts of war in the world, and ultimately all weapons. Even though he himself is one of those targets,

Legend Gundam Stratosphere | 爆熱の民's Gunpla works