A schoolteacher from Carnac, France who gets pulled into the supernatural world after a devastating encounter with killer automatons.
During the Karakuri arc, Sharon and her students come under attack from Flavio's mechanical army. Paralyzed by fear at first, she's snapped back to reality by Tania, an older Shirogane member, who tells her to act. She manages to shield her students and teams up with Narumi and Lucille to take down Flavio, but the effort leaves her mortally wounded. Narumi saves her life by giving her his blood—or more specifically, the "water of life" it contains—bringing her back from cardiac arrest.
By the time the Last arc rolls around, the world is ravaged by the Zonapha disease, but Sharon remains immune thanks to Narumi's blood. Inspired by Tania's final words, she dedicates herself to helping people across France. When she randomly crosses paths with Masaru, she shares a meal with him and reveals that Narumi saved her life—news that finally gives Masaru hope that his brother is still alive. Before they part ways, Sharon asks Masaru to deliver a message: "This time, I want you to be saved."
In the anime adaptation, she's sidelined for most of the story. She only shows up near the end to talk with Masaru, with a brief flashback explaining how Narumi rescued her from the automatons.
Content compiled by AnimeList.moe from publicly available sources.
