Assassin

Assassin: People who are trained to kill other people for political reasons or other reason. They exist in the world of One Piece.

The Baroque Works are known to have assassins in Whiskey Peak. Mr 5 and Miss Valetine tried to kill Princess Vivi but failed. Mr. 3 tried to kill the Straw Hat Pirates, Vivi, Dorry and Borgy. Daz Bones was also an assassin from West Blue

Nico Robin claimed herself that she is the assassin but jugding by her past story, it was unknown who she assassin however she did tried to kill Crocodile because he was going to kill her.

The CP9 are the frist assassins in the series to be from the World Government and they are the olny World Government assasins. Lucci, Kalifa, Blueno, and Kaku was assinged to Water 7 to get the blueprint and kill Iceburg.

Meanwhile Jyabura, Fukuro and Kumadori were sent to an unamed town to assassin 3 key leaders (Dragon not included).