Wilhelm Ehrenburg, also known by his Demon Name Kaziklu Bey, is an antagonist in Dies Irae. A member of the Longinus Dreizehn Orden, he occupies seat IV of the Black Round Table.

A man with a long criminal record who served as a First Lieutenant for the infamous 36th Waffen Grenadier Division of the SS. An albino, he shuns all light, especially that of the sun. In return, all of his senses magnify in the darkness, almost as if he was a vampire. Having embraced that nature of his as part of his identity. Wilhelm's designation and fondness for vampiric characteristics is no coincidence.