Trafalgar Law

Trafalgar Law (real name: Trafalgar D. Water Law; トラファルガー・D・ワーテル・ロー) is the Captain and doctor of the Heart Pirates. He is also called the "Surgeon of Death" due to his combat skills and medical expertise. He is also later on revealed to be a "D" bearer himself, much like Monkey D. Luffy and Portgas D. Ace.

Years ago, Law was originally the only survivor of his hometown of Flevance due to a disease that took over and thus resulted in a massive quarantine. Law eventually served as one of Donquixote Doflamingo's pirates due to a lust for destruction as his was soon to be dead in three years and due to everything he lost in his life. When Doflamingo killed his brother Corazon AKA Rosinante (an undercover navy officer against him and who was the only person in Law's life that cared for him and even bothered to help find a cure for his illness), Law left Doflamingo and thus formed the Heart Pirates. Law eventually plotted his revenge towards him for years, leading up to the events at Dressrosa.

Law was one of the pirates who participated in the Marineford War against the World Government. In the aftermath, he joined the Shichibukai until Fujitora revoked his status.

Role in Games
Law's appearance in One Piece: Pirate Warriors 2 comes after Luffy's alliance rescues Whitebeard from Teach's control. He points out that even if they could continue the pursuit, the black bearded pirate had disappeared with a large portion of the Marines. The only reason for Law's recruitment was to take down Blackbeard. When that is taken care of, he would deal with the others himself. Even though the Operation Dial is gone, the surgeon found out the Frenzy Dials would be resupplied at Sky Islands. In this game, he is first seen in his time-skip form, via his coat and new hat.

Law's canonical appearance would be during the Sabaody Archipelago in Pirate Warriors 3, via his pre-time-skip form. Initially Law appears out of coincidence and encounters both the Straw Hat Pirates and Eustass Kid, and even has a few interactions with him. Eventually Law reappears at Marineford in order to rescue Luffy and Jinbei. For most of the part, he seems to be someone who would sit back more on the sidelines.

Via his time-skip form, Law appears at Punk Hazard trying to find Caeser Clown, hatching a intricate plan to bring down Kaido, one of the Four Emperors. Via prior trauma during his time spent with Corazon, Law settles his score with Vergo, one of Doflamingo's executives. Later on, Law then traverses with the Straw Hat Pirates to form an alliance to take down Kaido, along with some notable hijinks that often comically shocks Law to no end.

Eventually during Dressrosa it is shown Law has mainly set up such schemes in order to kill Doflamingo in his brother's place (as like their father Corazon was too kind-hearted to "pull the trigger"). From there, despite plans falling apart due to several events, Law would even try to risk his own life to kill Doflamingo no matter what it takes. During their confrontation Law then reveals his "D" initial to Doflamingo, stating that due to Doflamingo's former World Noble/Celestial Dragon stats, both Luffy and him would eventually oppose him through fate someday.

Due to the Dressrosa arc not fully being concluded in the original series (manga and anime alike) by the time Pirate Warriors 3 takes place, Doflamingo escapes after being dealt a mighty blow by both Luffy and Sabo with Law attempting to finish him off. Eventually Law continues with the Straw Hat Pirates to tackle on the Four Emperors.

Personality
Trafalgar Law is almost always seen with a smile on his face. One of the few times he doesn't smile is when he's shocked, explaining things or frowning in deep thought. He's often a very calm and calculating character, who isn't afraid to boast about how strong he is in battle as well as being rather reckless and defiant, which also ties into his slight streak of cruelty. However, he does have a few standards.

Another notable trait about Law is his dislike of being ordered around, but knows what's best for a current situation at times. Despite his possible antagonizing towards Luffy, the Straw Hat captain is quick to consider Law his friend despite their supposed alliance during the time-skip.

However, his grudge against Doflamingo due to the death of the one and only person who cared for Law drives him to his goal of revenge, and to act harsh towards anyone who dares insult Corazon like so.

Quotes

 * See also: Trafalgar Law/Quotes

Fighting Style
Law's fighting style relies on his sheathed sword, Kikoku, which he carries around. His power from the Op Op Fruit gives him the ability to swap body parts of others. He can also make a dome called the Room, which he can control the movements. Law also has the ability to swap minds of others, much like how he can swap body parts.

He also is able to generate electricity in tandem to use electric-themed surgery attacks, such as Counter Shock and Radio Knife. Much like the aforementioned theme, almost all of Law's techniques are named after medical and surgical terms.