A young Ishbalan who looks after his younger brother Rick. For a time he held a deep resentment against his mother for abandoning them during a military raid, but changed his opinion after learning that his mother suffered from an illness leading to blindness. After Scar decided to fulfill his brother's goal and create the Philosopher's Stone, Leo hated Scar for becoming an 'exile'; however, Edward's word convinced him not to judge people for their choices. Toward the end of the anime series Edward receives permission from the military to have Leo and his brother Rick released and transferred to Resembool; however both Rick and Leo turn down the offer.

Leo doesn't appear in the manga.