Ishigami Byakuya

Overview

Ishigami Byakuya is a prominent supporting character in Dr.STONE and the protagonist of its spin-off manga Dr.STONE reboot:百夜. He is the adoptive father of Ishigami Senku and the founder of Ishigami Village. Originally working as a university lecturer, Byakuya fulfilled his dream of becoming a JAXA astronaut and was stationed aboard the International Space Station when a global petrification event struck Earth. As one of the last six surviving humans, he returned to Earth to preserve humanity's legacy. Unwaveringly faithful in his son's ability to rebuild civilization, Byakuya spent the rest of his life laying the foundations for the future of science.

Appearance

Byakuya is characterized by his distinctive white hair that spikes upward and his vivid red eyes. He sports a light dusting of facial stubble around his jaw. During his career as an astronaut, he wears a blue flight suit and space gear. After returning to Earth in the primitive era, his attire shifts to simple, rustic woven garments suitable for survival.

Personality

Byakuya is an upbeat, charismatic mood-maker who brightens any atmosphere. A romanticist at heart with a playful streak, he possesses immense warmth and an unwavering sense of parental devotion. He wholeheartedly supports his adopted son Ishigami Senku, going so far as to sell his own personal car to fund Senku's scientific research equipment. Byakuya carries a strong sense of duty as one of humanity's last astronauts, demonstrating extraordinary perseverance by dedicating decades of hard labor to ensure future generations can revive civilization.

Abilities

Beyond his academic background as a university instructor, Byakuya demonstrated physical and mental resilience by passing JAXA's astronaut selection process. His technical skills include constructing the autonomous robot REI and engineering a primitive glass phonograph record to store audio. To aid distant descendants, he composed the Hundred Tales, an oral lore system designed to pass down essential survival knowledge. Furthermore, he possessed the physical endurance required to manually pan rivers for platinum and gold sand over several decades.

Background

While working as a university lecturer, Byakuya pursued his dream of entering space. Although initially failing an astronaut swimming test due to leg cramps, he passed after training with customized gear made by Senku and Ooki Taiju. Stationed aboard the International Space Station during the sudden petrification of humanity, Byakuya and five fellow astronauts avoided petrification and returned to Earth. Recognizing that his adopted son would one day reawaken, Byakuya founded Ishigami Village, instituted oral legends to preserve knowledge, and spent his remaining decades gathering rare minerals from rivers until his peaceful passing.

Relationships

Byakuya shares a profound bond of trust with his adopted son, Ishigami Senku, whom he raised with unconditional love and supported in his scientific pursuits. Among his fellow astronauts aboard the space station, he married Lilian Weinberg. He also worked alongside Shamil Volkov, Yakov Nikitin, Darya Nikitina, and Connie Lee as the final six human survivors who founded the precursor to Ishigami Village. Additionally, Byakuya created the robot REI, establishing a connection that extends beyond his human companions.

Trivia

Byakuya serves as the main protagonist of the official spin-off series Dr.STONE reboot:百夜. A subtle connection between him and his adopted son lies in their names, as Byakuya contains the numeral for hundred (百) while Senku contains thousand (千). The platinum deposits and glass record he painstakingly preserved across his lifetime ended up becoming essential components for Senku's team thousands of years later, enabling the mass production of petrification revival fluid.