A heretic scientist who belonged to the Elgaia Federation at the time of the establishment of Akras Summoners' Hall. Heins was a leading researcher of the Federation， renowned for his success in applying otherworldly technology to animate a mechanical being. He was respected by his peers and superiors alike， yet it's said that a former subordinate who was appointed as captain of a Demon Slayer Squad bore a grudge against him. During combat testing of Heins's masterpiece， a horrific accident claimed many lives. Heins was accused of intentionally causing the catastrophe and was imprisoned.