Brian Jay

Birthday: July 21, 1969 A veteran astronaut with NASA. He was Hibito's mentor.

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He died in an accident on November 12, 2023 when the three parachutes of the landing aircraft transporting him and his team back to Earth from the moon got tangled and hit the ground at the speed of 640 km/hour, completely destroying it.

Brian was a veteran and reputed astronaut; he shared his knowledge and helped many astronauts including Hibito during their training. (Source: Uchuu Kyoudai Wikia)