Daigotsu Eiya

Daigotsu Eiya was originally a Kakita before being tainted and twisted by Daigotsu Taki. Where he once was an duelist who used his sword like an artist would use a brush he is now just a brutal killer with no thought for grace or artistry.

The process that created Eiya removed all form of sensation from him, he no longer feels pain nor pleasure.

Nokemono
In 1168 an assault on the Temple of the Ninth Kami by Munemitsu no Oni was foiled by the free ogre Kayomasa and Eiya. As a reward for this service, Eiya was given Nokemono to wield, the blade forged by Tsi Xing Guo.