Byakuya Ishigami

Byakuya Ishigami (石 (いし) 神 (がみ) 百 (びゃく) 夜 (や) , Ishigami Byakuya) was Senku Ishigami's adoptive father. He was an astronaut residing on the International Space Station in space when the petrification event on Earth's surface occurred.