Martin Jigmar

Background Commander of HOLY. Martin Sigmar is an American immigrant to Japan, and one of the first and oldest known Alter users. He was the first to be refined. His alter power is not shown until late in the series and is called "Alter Alias." This alter consists of two parts: An armor that protects sections of his body, and a stand-alone mecha that moves independently but under control from Sigmar much like Ryuho and his Zetsuei. Using the body armor and mecha, Sigmar can create nearly unstoppable shockwaves of compressed air. Later on, he dies after a pitched battle with Ryuho in which it is revealed that his alter power causes him to age very rapidly. In the manga, his face is only a front; his real face is of a young man. He dies of premature aging. In the anime, he's somewhat of a stern figure and a father figure to Ryuho; in the manga, his personality is similar to Kyoji Mujo. He first appears in Episode 1.

His last name in romaji has been spelled as anything from Jagmar to Zigmarl, but is revealed in episode 21 to be Sigmar on a Login screen