One does not often get a glimpse of Leon back at home as he is usually busy fiddling with self-grown mushrooms in his back garden. These have unknown effects on anyone who is unfortunate enough to eat them. However, through his knowledge of medical drugs they are turned into powerful substances helping him in his surgical procedures. Over the years Leon has specialised in transplanting organs, making him and his skills highly sought after. But he has never shared his secret technique with anyone, instead he travels around the country to assist the people that are in desperate need for his expertise.
Behind his reserved persona lies a childhood that was cut short by responsibility, raising his younger brother on his own, which forced Leon to mature quickly and become quite protective of the only family he has.