During his father's rule over as a Marine in Shells Town, Helmeppo was a spoiled and obnoxious man, constantly exploiting anyone he could with threats of arrest and execution. Whenever his status failed to protect him, he would inevitably collapse into total cowardice. Helmeppo matures after training with Marines, even referring to his younger self as "that bratty, selfish son who lived off his father's status". He developed a penchant for being overly formal and levelheaded.