Although it is evident
by his appearance that he is a Ninja, Sasuke's true identity remains unknown.
Presently, he works as an agent for Red Scorpion, but since he has a mild
case of amnesia, he cannot remember his true name. However, during a mission
in which he was to assassinate the adventurer, Koji Masuda, he notices
a mysterious stone embedded within a broken sword held by Masuda. Believing
that this precious stone will enable him to recover his long lost memories,
Sasuke aims to acquire the legendary weapon, EHRGEIZ.