Tarvitz's rank as a captain of the Emperor's Children has been constant throughout the series. However, depending on the book, the company which he is attached to differs. In ''False Gods'', Tarvitz is only described as a captain, with no company assigned. However, in ''Galaxy In Flames'' and ''Flight of the Eisenstein'' he is mentioned consistently as the First Captain of the Emperor's Children and in ''Fulgrim'' that honour is assigned to [[Julius Kaesoron]], with Tarvitz assigned to the 10th Company.{{Cite this}}