Hunter X Hunter
Hunters are a special breed, dedicated to tracking down treasures, magical beasts, and even other men. But such pursuits require a license, and less than one in a hundred thousand can pass the grueling qualification exam. Those who do pass gain access to restricted areas, amazing stores of information, and the right to call themselves Hunters.
By Yoshihiro Togashi (Hunter X Hunter)
A young boy who wishes to become a hunter to find his father, the legendary hunter Ging Freecss. Ging had left Gon in his aunt's care since birth. Gon is a headstrong optimistic youth with extraordinary senses of smell and hearing, sharp instincts, and an innate understanding for animals.
Gon starts with an unusual choice of weaponry - a fishing rod. After learning nen, he switches to relying on his Hatsu ability, the Jajanken.
The last living member of the Kurta clan, Kurapika has made it his life goal to hunt down and destroy the group responsible for his tribe's destruction - the Phantom Troupe. His tribe was renowned for their eyes - which would turn flaming scarlet in times of anger or emotional agitation. The so-called 'scarlet eyes' (also known as Kurta eyeballs) were considered a priceless treasure among body-part collectors, which is what prompted the Phantom Troupe to destroy them.
Kurapika enters the Hunters Exam because he believes becoming a Black-List Hunter will give him the necessary resources to fight the Phantom Troupe. Kurapika is in general calm and level-headed, preferring to think before leaping into battles. He is also a strong fighter - a huge boost in strength and agility being a side effect of his tribe's scarlet eyes. After being taught nen, Kurapika develops the ability to use two nen types - his usual conjuration type, and a specialization type that comes into effect only when his eyes turn scarlet. The specialization type allows him to use the other five nen types all at 100% efficiency. He takes advantage of this fact while fighting against the Phantom Troupe by tricking them into thinking they are fighting a nen user whose only ability is either manipulating or conjuring chains. He doesn't want anyone to know he was from the clan so he wears dark-colored contacts.
Leorio claimed that he joined the Hunter exam solely for money. Later, he reveals that it is because he wishes to become a doctor, and needs the money to pay for school fees. He lost his friend Pietro to a debilitating illness only because he had lacked the money to pay for a cure, and now aspires to become a doctor who is able to cure the poor without needing to charge.
He is not so much of an experienced or talented fighter like most of the other Hunter Examinees, but is by no means weak. He is actually revealed to be physically stronger than Gon or Kurapika. He too, came to learn of nen after passing the Hunter exam. However, he has (at current) chosen to put aside his nen training so he can fulfill his goal of becoming a doctor. Before showing Gon and Killua his Nen he thought that all there was to nen was "ten," one of its four aspects; however, he was corrected by Gon and Killua.
Born to the Zoldyck family of assassins, Killua is considered the genius of his generation. He has been trained and raised since birth to take over as heir of the Zoldyck family business of assassination and is already a professional assassin even at his young age.
Killua joined the Hunter exam after running away from home, and by chance meets and befriends Gon. He is a very agile and strong fighter with just his bare hands, carrying his family's characteristic immunity to poisons and electricity. He later bases his Transmutation type Hatsu ability on electricity. One of his other killing abilities was to 'alter' the bone structure of his hand in a way that would sharpen his fingers and nails to the point of a lethal claw. This allows him to slice up his opponents and/or pluck out vital organs. He also knows a technique called the 'rhythm echo', which creates a series of after images of him through a varying cadence of steps. Later, he learns to fight with a yo-yo and electric shocks.
Hiding under the guise of a clown-faced magician, not much is known about him or his past. During the Hunter exams Hisoka decided to take on the role of assistant examiner and commenced to kill anybody whom he thought did not meet his standards as a hunter. During this event Hisoka met Gon and became interested with him after realizing the potential Gon had to become a great hunter due to his his courage to face him despite great odds solely to protect his friends. He believed he was a Hunter he would see grow to his prime, then destroy. Due to knowledge of nen being so limited, Hisoka takes advantage of this and uses nen freely, claiming it to be magic. This would make him more of an illusionist than someone who actually has magical powers. Despite dressing up as a clown claiming to be a magician, he is an extremely skilled and dangerous fighter.