Leopard Error Franken-bach

In the Space Symphony Maetel account, he is initially loyal to the Millennial Queen. After realizing he still has humanity, he joins Maetel, Nazca, Emeraldas and Harlock and turns against Promethium II, the Millennial Queen and her plan to convert mankind into cyborgs. He is later shot and killed by a half-dead cyborg, which he kills before falling.

In the 1000-Year Queen account, Leopard is the undefeated commander of La Metal. The Millennial Queen orders him to investigate Yukino Yayoi. Yayoi later kills him when he attempts to kill her younger sister Seren, who remembers Leopard as an instructor who cared for her.