When Jason Lee moved to Paragon City as a young boy, he already had a fascination with the samurai movies he would watch every weekend. When the Tsoo began helping the Security Chief in Steel Canyon clear out rival street gangs, he leaped at the chance to join them. Soon, he was an up and coming Dragon Enforcer, apprenticed to Broken Night and studying the ways of the sword.

Jason excelled at the sword, earning renown and respect from his fellow tsoo. His tenacity against the members of the Trolls gang eventually earned him the name Onimarikaru - "Ogre Slayer".

Eventually, the Tsoo gained enough power and influence to turn against the Security Chief they had once assisted. When this happened, Jason was devastated.

Believing his honor tainted, he rebelled, severing his ties with the Tsoo in a bloody conflict. But, the Tsoo do not forget so easily...