The world of One Piece has seen the rise of several powerful assassins over the years. These people often work independently from pirate groups and are either hired or work under a bigger organization that possesses a lot of influence.
10 Miss Doubefinger
Miss Doubefinger was a member of the Baroque Works that was established by Sir Crocodile and made her debut during the Alabasta arc of the story.
She was quite a powerful assassin and partnered Mr. 1, which just goes to show that her level of skill was excellent indeed. In Alabasta, she attempted to defeat Nami, however, failed at doing so despite being much stronger than the latter. She’s certainly a capable assassin.
9 Daz Bones
Daz Bones, also known as Mr. 1, was the strongest subordinate of Crocodile and also an extremely capable assassin. Before joining up with Baroque Works, he worked in the West Blue and was infamous there as a skilled bounty hunter.
He possesses the power of the Supa Supa no Mi, which has turned him into a dice human, capable of turning any part of his body into a blade. As such, his powers are perfect for assassination missions and he proved how dangerous he is when he fought Zoro.
8 Baby 5
Baby 5 was once one of the many underlings of Donquixote Doflamingo, the King of Dressrosa. She was manipulated into working for him from a very young age and to aid him, she made use of her assassination powers very well.
Baby 5 is a user of the Buki Buki no Mi, which allows her to turn her body into any weapon that she can think of easily. Essentially, her Devil Fruit is similar to that of Daz Bones, only it can do much more than just turn her into a blade.
7 Senor Pink
Senor Pink was another member of the Donquixote Pirates and quite a skilled member of the group as well. He showed his skill during the Dressrosa arc, where he took on the Shipwright of the Straw Hat Pirates, Franky, in combat.
With the powers of his Sui Sui no Mi, he was able to swim on any surface and give Franky quite a lot of trouble. Despite that, he ended up losing the fight. Nonetheless, he was a capable fighter and a decent assassin.
6 Jabra
Jabra was one of the strongest members of the CP9 and was introduced to the fans during the Enies Lobby arc. There, he showed his cunning nature as an assassin of the CP9 and displayed his ferocity to the fullest.
Eventually, he ended up fighting against Sanji and this fight proved to be his downfall. Nonetheless, Jabra was quite an opponent for Sanji and gave him a tough time, as is expected of a strong CP9 assassin.
5 Who’s Who
Who’s Who was recently introduced to the fans during the Wano Country arc and was revealed to have been a former member of the prestigious CP9. As such, he is automatically a former assassin. His genius was such that it was often compared to the likes of Rob Lucci.
In fact, even his Devil Fruit was better as he held the Neko Neko no Mi, Model: Saber-Toothed Cat. Who’s Who possessed an array of powerful techniques up his sleeve and was a capable assassin in the past.
4 Hitokiri Kamazo
Hitokiri Kamazo was none other than Killer in disguise, however, as a mentally broken man. He made his introduction in the Wano Country arc, where he played the role of Orochi’s lapdog.
He slaughtered a everal people across the Flower Capital and eventually, tried to kill Hiyori and Otoko, a task which was eventually obstructed by Zoro. In an intense fight, Zoro ended up defaming Kamazo and passed out himself.
3 Kaku
Another member of the CP9, Kaku was introduced to the fans in the Water 7 arcs here he posed as a shipwright working for the Galley-La Company. Kaku then revealed himself to be one of the many assassins of the CP9 working to find the blueprints of the Ancient Weapon Pluton.
In Enies Lobby, he consumed the Ushi Ushi no Mi, Model: Giraffe, and grew stronger. Kaku then fought Zoro, however, ended up losing the fight.
2 Nico Robin
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Nico Robin is the archaeologist of the Straw Hat Pirates and an extremely skilled fighter as well. She is one of the most important people in the One Piece world, if not the most important.
Robin has the power of the Hana Hana no Mi, which is perfect for assassination. In fact, before joining the crew, she served the role of Miss All Sunday for the Baroque Works and, thus, specialized in assassination.
1 Rob Lucci
Rob Lucci is known to be a prodigy when it comes to violence and he has certainly done enough to warrant the position of the strongest assassin in One Piece so far. He is skilled in all the Rokushiki and has even unlocked the Rokuogan.
At the same time, Lucci has a powerful Devil Fruit that allows him to turn himself into a leopard and its hybrid at will. Lucci is extremely capable as an assassin and certainly one of the strongest fighters in the story in general.
