Yure Shinatose stands as a cornerstone of survival aboard the generation ship Sidonia, her scientific acumen forged in the aftermath of a century-old catastrophe that obliterated 99% of its population. Tasked with overcoming crippling resource and demographic crises, she leveraged her genetics expertise as a member of the Immortal Ship Committee to engineer photosynthetic humans—a breakthrough that slashed the ship’s dependence on conventional sustenance and accelerated repopulation. Her rise to prominence followed the Ochiai Insurrection, during which she advocated extracting Scientist Ochiai’s brain for study and championed cloning programs to replenish Sidonia’s dwindling ranks. These actions solidified her reputation as a linchpin of the ship’s recovery, though she prioritized scientific innovation over political maneuvering. Though referred to as the "granny" of Izana Shinatose, the exact nature of their kinship—biological, clonal, or otherwise—remains undefined. Yure’s foundational research shaped Sidonia’s societal evolution, including the emergence of intersex third-gender individuals like Izana, whose bodies adapt in response to emotional and social triggers. While her direct participation in later conflicts against the Gauna or the Lem system colonization remains unrecorded, her legacy endures through the enduring presence of photosynthetic humans and the social systems she pioneered, which continue to underpin Sidonia’s survival.