Guy Christophe Rech, a Shirogane and puppeteer of Olympia, is best known for saving Narumi Kato's life after a fatal wound cost him his left arm—Guy used the last of his Aqua Vitae to turn Narumi into a Shirogane. He's earned legendary status with nicknames like "Destroyer of 200 Bodies" and "Olympia's Lover." Beyond that pivotal moment, Guy raised Éléonore as her teacher and, in the manga, trained Masaru in puppeteering as well.
Guy comes across as calm and handsome, the type who quotes Shakespeare at length. He's 34 years old, though fans often note the contradiction in his personality—stubborn and cold on the surface, yet deeply paternal underneath. He has a notable weakness: he regresses into childish behavior if separated from his pendant, which holds a photo of his mother, Maman.
He's employed at Dr. Leif Banhart's hospital, which doubles as both a research facility and orphanage for children with Zonapha syndrome. The anime and manga handle Narumi's recovery differently: in the anime, Guy brings him directly to Banhart's hospital, while the manga has them hiding out in France, the Shiroganes' native country.
Content compiled by AnimeList.moe from publicly available sources.