Mugen often states his desire to fight and kill Jin once their quest is over, and Jin returns this desire and on the numerous occasions where Mugen is going to face a strong opponent and possibly risk his life, Jin reminds Mugen that 'I will be the one to slay you'. Mugen does likewise. In the final episode, exhausted and near death, Jin and Mugen finally do have their battle, but both their swords break when they clash. Afterwards Mugen states that he doesn't want to kill Jin, another sentiment that Jin returns.