Ernest

Ernest, most recognized by his alias Kanto, is a in the  who is deployed only under special conditions due to the nature of his skill-set.

Unlike the majority of Marines, Ernest is a man who underwent considerable modifications on his body and, in the process, has become a, albeit one that still retains his identity. He was a part of a secret project within the that intended to extend the  worked on by  and take them to new heights. The severity of the experiment on its subjects left Ernest the unlikely survivor of the project.

He was placed into the Marines like all other recruits and grew from the bottom-up. As a result of his cybernetic modifications, Ernest had a considerable advantage compared to his fellow Marines, excelling in the Marine's combat training and rising meteorically through the ranks. He was eventually placed in expeditions, where he proved his true worth as an incredibly potent adversary towards all users. Ernest's continued rise in strength eventually lead to him being feared by the World Government's enemies as "The Devil's Bane" (魔王の滅人).

Despite serving the Marines faithfully, Ernest's obscure background and his loyalty to "validating my [Ernest] strength" lead to the organization keeping regular tabs on his person, for if a weapon of his caliber falls into the hands of a sufficiently threatening Pirate, the tables may very well turn in the.