lee is sasukes dead brother
or so sasuke though. lee learne of a type of sword art that in order to win you ahd to die to learn. he asked his father for death and he was granted it. lee spent years in the world of the dead leaning this sword paly a cross between the ninja and a samurai it has great speed wiht this sword play.but learnig this sword paly comes wiht a great cost. your old self is traped wiht in your blade. becoing a true spirit sword that the tribe beleives in. if lees swor dis ever broken he will die. but the only thing that cna breka his sword is another sword wiht a spirit as strong as his in it.

yea i did forget to menchon lees and sasukes people belive eveyr weapon has a spirit no matter what even if you grab a tree brance and use it it will ahve a spirit. and msot importantly brekaing your oponets weapon is fronwed apaon and te peneltity some tiems is death. unles the weilder is not in teh right state (in other words if you break the sword of a psycho pat then your ok but if you break a sword of a warrior then you can be killed