Golgo 13, also know as Duke Togo, is the titular character of a manga series created by Takao Saito. An assassin for hire, he accepts jobs from various organizations & individuals. He is known for - among other things - his cold, calculating attitude, superb marksmanship skills & prowess with women.
Backstory
Nobody knows Golgo 13's history. Although various stories have provided details about his past, they always contradict each other or cast doubt upon themselves. Many people have speculated that he might be Japanese or otherwise Asian, given his pseudonym "Duke Togo".
Personality
Golgo 13 is cold & ruthless. Whenever he takes a job, he will not stop until it is complete. He is mostly quiet, talking only when he needs to. Despite his cold attitude, Golgo 13 has also admitted that he is cowardly as a rabbit, which is part of the reason that he manages to stay alive for so long. He also hates it when people walk up or stand behind him, and will punch anyone who does so.
Rules
Golgo 13 has a specific set of rules for carrying out contracts: He will only speak with a client once and refuses to enter into long-term contracts. Clients must be completely honest with him about their reasons for proposing the contract, and he will not tolerate any sort of betrayal or double-crossing. He will not accept contracts where the reasons are unclear.
Abilities
Golgo 13 is a top-notch sniper. For example, he was able to shoot Robert Horton at a distance of over 500 yards through a two-feet wide opening between two buildings with the sun shining in his face. He is very athletic and highly resistant to pain. He is also an excellent driver, as seen in Golgo 13: The Professional.
Items and Weapons
Golgo 13's weapon of choice is a customized M16 assault rifle. For backup, he carries a snub-nose revolver. He has various cars, most notably a Ford Laser in Golgo 13: The Professional