カツラ, Blaine, Auguste, Pyro
Katsura is the Gym Leader of Guren Islands later the Twin Islands Gym known officially as the Guren Gym. He hands out the Volcano Badge to Trainers who defeat him. He is a highly intelligent man who specializes in Firetype Pokmon. Katsura likes to make up riddles and use puns even in inappropriate situations. Even so he is a stern opponent and takes his role as Gym Leader very seriously. He values a keen challenger and makes sure they truly earn their Volcano Badge in battle. He has crafted his battle strategy around his Gyms volcanic location which suits his Fire Pokmon against its biggest weakness Water Pokmon. Source: Bulbapedia