Matsu Kaoru

Matsu Kaoru was an honorless courtier of the Lion Clan, who killed the Crane Clan Champion's son in a duel that appeared to be fair in court. A Crane bushi, Doji Yujiro, knew that Kaoru had used poison to weaken his opponent. Yujiro became a disavowed ronin to take revenge on the Matsu. Eventually Kaoru was killed during an attack on the Dragon before Yujiro could complete his mission.