Grayblade

Grimblade is a character from The Legend of Zelda: The Minish Cap. He is one of the Blade Brothers, masters of the sword. His Dojo is located on Mt. Crenel, or more specifically, in the south-eastern section of the great wall found in the region. The entrance can only be opened with a Bomb. Once inside, Link must split himself into two to open the door to his training room. He can teach Link the Roll Attack skill.