Jeffrey "Jeff" Jason Cornet is a villain in the Batman: The Telltale Series. He is the main villain of the first episode Realm of Shadows and a minor villain in the second episode Children of Arkham. Cornet is the ruthless head of the Cornet Mob. However, he has never been convicted as he could not be linked directly to any crime. Despite that or maybe just because of it, his men leave a white rose, Cornet's symbol, on the places of their crimes.