OVA
Description
Mike Zacharias served as a section commander in the Scout Regiment, leading Squad Miche and widely recognized as humanity's second strongest soldier, surpassed only by Levi Ackermann. Standing tall at 6'5" (196 cm) with a well-built frame, he had blond hair parted down the middle, a dark mustache, and a beard, typically seen in the standard Scout Regiment uniform and green cape. His personality remained calm and serious, speaking rarely unless addressing critical matters, and he possessed a notable habit of sniffing people upon first meeting them.

He demonstrated exceptional combat proficiency with omni-directional mobility gear, capable of eliminating multiple Titans single-handedly in open terrain. His most distinctive ability was an extraordinarily acute sense of smell, enabling him to detect Titans well beyond visual range and identify their numbers and locations. Official statistics rated his combat and olfactory abilities at 10/10, with high scores in initiative (9/10) and teamwork (9/10).

During the 844 mission to capture Levi Ackermann depicted in the OVA "A Choice with No Regrets," Mike ambushed Levi and later assisted Erwin Smith in interrogating Levi's companions by physically restraining him. He was present when Levi, Furlan Church, and Isabel Magnolia joined the Scout Regiment. On the 23rd Exterior Scouting Mission, Mike and Erwin discovered the aftermath of Titan attacks on Flagon's squad, leading to Levi's aggressive confrontation with Erwin; Mike intervened to separate them. He also appeared in the "Ilse's Notebook" OVA, alerting comrades to approaching Titans during the 49th Expedition.

Within the main storyline, Mike escorted Eren Jaeger to his trial and participated in the 57th Exterior Scouting Mission to capture the Female Titan. He attempted to extract Annie Leonhart from her Titan's nape alongside Levi and later detected incoming Titans through scent as the Female Titan summoned them. When Titans breached Wall Rose, Mike's squad investigated potential accomplices among the 104th recruits. Smelling approaching Titans, he reassured Nanaba by stating humanity's defeat occurs only when they cease fighting. He single-handedly engaged nine Titans to buy time for his squad's escape, eliminating five before encountering the Beast Titan.

The Beast Titan incapacitated Mike by hurling his horse at him, crushing his legs. After questioning him about omni-directional mobility gear and confiscating his equipment, Mike attempted to fight despite his injuries but was subsequently devoured by surrounding Titans.

Later, Mike appeared in the memories and visions of surviving comrades. Erwin Smith visualized him atop a mountain of fallen soldiers while reflecting on command decisions. Hange Zoë invoked his memory when opposing Eren Yeager's plan for global destruction, believing he would not support such actions. Levi recalled Mike during the battle against the Jaegerists and again after Eren's defeat, where Mike appeared among fallen Scouts saluting Levi's accomplishments.

Mike maintained significant professional relationships within the Scout Regiment. He shared deep mutual trust with Commander Erwin Smith, serving as his right-hand man for years despite finding Erwin difficult to read. His dynamic with Levi evolved from initial antagonism during Levi's capture to capable battlefield coordination. He held mutual respect with Hange Zoë, frequently serving alongside them under Erwin's command.

Mike's birthday was November 1st, shared with Nile Dok. Hajime Isayama confirmed Mike was older than Erwin Smith. Early conceptual sketches used "Yamada Taro" as a placeholder name.