Muramasa,the primary antagonist and orchestrator of the anime-exclusive Zanpakutō Unknown Tales arc, is a mysterious Zanpakutō spirit with the power to release other Zanpakutō spirits from their owners. Muramasa appears as a tall thin man with pale skin and shaggy, dark brown hair and two bangs dropping and crossing over the bridge of his nose. He has turquoise-colored eyes circled by purple marks similar to his tsuba and the design of his clothes. Probably his most prominent feature are his long fingernails, shown to be much shorter before his long separation from his master. Muramasa wears a long white robe-like coat, somewhat reminiscent of an Arrancar's. The collar of the robe is covered with a thick fur, featuring a purple ascot fastened by a ruby brooch. Muramasa wears a wide sash at his waist, decorated by a purple stripe. He wears boots with pointed tips similar to those worn by Gillian-class Menos.
