Shosuro Haikono

Shosuro Haikono was a ninja of the Scorpion Clan. He was the student to Shosuro Daigo, who taught him how to kill without being noticed. During a visit to the court Daigo gave hisr farewells to the other guests, and the usual gift to the resident daimyo, a netsuke. The trinket had been colored with poisoned paint, still wet. No poison in any paint could be powerful enough to kill with a touch, and not be noticed by the daimyo's yojimbo, but the victim bit his nails. The daimyo died and sensei and student slipped before things grew difficult.