Kakita Toshimoko

Kakita Toshimoko was sensei of the Kakita Dueling Academy for many years prior to the Clan War. He personally trained the sons of Doji Satsume, Doji Hoturi and Doji Kuwanan, both of who would become Crane Clan Champions. Toshimoko was also Emerald Champion for many years. He died a ronin, having faked his own death to investigate the disappearance of Emperor Toturi I.

The Disappearance of Toturi I
After the disappearance of Toturi I in 1130 Toshimoko called in the aid of the Kitsuki family, acknowledging the Kitsuki method of evidence on an Imperial scale for the first time in history. Their investigation, unfortunately, yielded no results, and the Regent Takuan ordered the exile of the Scorpion Clan to the Burning Sands.

Shortly afterward, Toshimoko penned his final haiku standing on a cliff near the sea. The following morning, his swords and armor were found, along with a petition to the Fortunes asking them to forgive him for his failure to his lord. With no Emperor or Emerald Champion, Shinjo Shirasu assumed control of the Emerald Magistrates and attempted to stave off widespread anarchy.

The Grey Crane
In reality, Toshimoko had faked his own death. He disguised himself as a ronin, wearing a mask at all times to conceal his recognizable face. He called himself "the Grey Crane," and scoured Rokugan, searching for the truth behind the disappearance of Toturi I. (3E pp. 20-21)

Death
Toshimoko was killed by the Ronin Dairya at the Battle of Oblivion's Gate in 1133.