Reinhard Tristan Eugen Heydrich (ラインハルト・トリスタン・オイゲン・ハイドリヒ, Rainharuto Torisutan Oigen Haidorihi), also called by his Devil Name, Mephistopheles (メフィストフェレス, Mefisutoferesu ), is the leader of the Longinus Dreizehn Orden and the main antagonist in Dies Irae . He occupies seat I at the Obsidian Round Table.