Uonuma Usui  

The Blind Sword

Usui was once a swordsman working for the shogunate government until he was blinded in battle against Shishio Makoto. Despite this, he possesses the Shingan, an advanced ability that allows him to sense people around him and detect their emotions through superhuman hearing. This talent is similar to the sonar of a dolphin or bat. Usui and Shishio made a deal where Usui could try to kill Shishio anytime he wanted, but deep down, Usui knows he won't be able to defeat his enemy. Saito recognizes this and believes that Usui boasts about killing Shishio to hide his inability to do so from others. Shishio is aware of this as well and uses it to his advantage. Since Usui can't kill Shishio, he targets weaker opponents to boost his ego. According to Cho, Usui is the second strongest member of the Juppongatana. He fights with a short spear called the rochin and uses a tortoise shell, the tinbei, as a shield to deflect attacks and obscure the enemy's vision.