

Several elements of Brave Fencer Musashi are superficially derived from the legend of Miyamoto Musashi, a famous Japanese swordsman, though the game's plot is unrelated to Musashi's life.

Bubbles & Gingerelle: Beautiful First Lieutenants of the Thirstquencher Empire.He was the one who kidnapped Fillet and turned out to be Flatski's son. Rootrick: Second Lieutenant of the Thirstquencher Empire.He was after the power of Lumina and wanted to release the Wizard of Darnkess and use him to take over the entire world. Flatski: Leader of the Thirstquencher Empire.Thristquencher Empire: Originally a peaceful monarchy until Flatski took over.He goes to many extremes to battle Musashi. He posed as Colonel Capricciola to get his chance to extract revenge on Flatski for killing his family. He turns out to be the son of the previous rulers of the Thristquencher Empire, making him a prince and true heir to the throne. Jon: Mysterious treasure hunter & owner of Leno, a sweethearted dog.Fillet: Princess of Allucaneet, kidnapped by the Thirstquencher Empire.Musashi: A young fencer summoned by Fillet to save Allucaneet Kingdom.There are also several minigames and puzzles scattered throughout which must be completed to advance the plot. The bulk of the game involves Musashi fighting a variety of enemies, using both Fusion and Lumina, to save the kingdom from various threats (which range from fires breaking out, to an invasion of half- vampire, half- zombie monsters called Vambees), and to acquire five scrolls which increase Lumina's strength and grant Musashi new abilities. Nevertheless, Musashi is given the blade Fusion, and charged with the task of obtaining Brave Fencer Musashi's sword - Lumina, the Sword of Luminescence - before the Thirstquencher Army does.

Fillet's intention was to summon the legendary Brave Fencer Musashi, who had saved the kingdom from a monster called the Wizard of Darkness 150 years before she is therefore disappointed when she gets a small boy instead. The player controls Musashi, a boy summoned to the Allucaneet Kingdom by its Princess - named Fillet - to save it from the invading Thirstquencher Empire. Spoiler warning: Plot or ending details follow.
