Jet is a French nobleman invited to the birthday party of Garnet, son of the Marquess of an estate bordering the character very fierce and bloody (it is a lover of hunting).Its name comes from the jet, a mineraloide of plant origin from which you can get gems. It has a minor role in the story, acting only expedient to meet Flourite and Degel, when the young waitress (in a moment of distraction) pours the wine for revenge and he begins to abuse her, saying that should clean it with his own blood. He is stopped by with his Degel Koliso (especially to be noticed only by Flourite) fell unconscious shortly after.