Complex sentence: Wolfgang Mittermeyer voiced by Katsuji Mori, flagship Beowulf, is best friends with Reuenthal and both were together referred to as the "Twin Pillars of the Empire", after the death of Kircheis.
Split into simpler sentences: Wolfgang Mittermeyer voiced by Katsuji Mori, flagship Beowulf, is best friends with Reuenthal. Together with Reuenthal they were referred to as "Twin Pillars of the Empire" after the death of Kircheis.