Hunter × Hunter

The Hunter × Hunter anime and manga series features an extensive cast of characters created by Yoshihiro Togashi. The series takes place in a fictional universe where licensed specialists, known as Hunters, travel the world taking on special jobs ranging from treasure hunting to assassinations. The story focused on 12-year-old Gon Freecss, and his quest to become a hunter in order to find his father, Ging Freecss who is himself a famous Hunter. While on his quest, Gon meets and becomes close friends with three other members who are also on a quest to become hunters for their own reasons.
Gon Freecss

Gon Freecss is the talented twelve-year-old main protagonist of the series. Gon was left in the care of his aunt Mito on Whale Island after she took custody of him in court. Holding great disdain for Ging's constant travels and putting Gon in danger, she forced Ging to give his son up so he could live normally. At the age of nine, Gon met his father's apprentice, Kite, who proceeded to tell Gon that his father was alive. Their meeting steered Gon towards deciding to search for Ging and also influenced him to take the Hunter Exam. Gon is naturally talented in a variety of ways, including superhuman senses, uncanny learning potential, social skills, and immense strength. However, he is simultaneously prone to influence by things he finds intriguing regardless of their inherent ethics.

Throughout the series, Gon adventures alongside his best friend Killua Zoldyck as a Hunter. Gon has been received well by Japanese readers, placing third in the first character popularity poll.[1][2] He is voiced by Junko Takeuchi in the Japanese version of the anime series and Elinor Holt in the English dub.
Killua Zaoldyeck

Killua Zaoldyeck is the secondary protagonist in Hunter x Hunter. Born as the middle child to a family of renowned assassins, the Zaoldyeck family, Killua mastered the trade at a young age and was designated to be the heir to the family business. But Killua rebelled against his family and ran away from home. Befriending Gon Freecss during the Hunter Exam, the pair decide to go on a quest to find Gon's father. Killua is in constant battle with his identity as a twelve-year-old and his identity as a murderer, often relapsing back to his former ways. Manipulated and tortured by his father and elder brothers, Killua has been raised to tolerate pain and simultaneously enjoy the act of killing.[3] His tolerance to pain is also what gives him his strength, as he has the ability to harness the power of electricity if it enters his body.

He is voiced by the voice actress, Kanako Mitsuhashi in the Japanese version.And Brina Palencia in the English version.
Kurapika

Kurapika is the sole survivor of the Kurta clan, a minority race with treasured irises that glow scarlet in times of anger or emotional agitation. A blacklist Hunter, Kurapika participates in the Hunter Exam alongside Gon in order to gain the power to take revenge for his race. A band of thieves known as the Phantom Troupe murdered Kurapika's entire race for their scarlet eyes, highly sought after on the black market, and he subsequently surrenders himself entirely to vengeance. Having killed two Phantom Troupe members, Kurapika is now haunted by the lingering auras of those he has murdered. But he vows to gain back all the stolen eyes of his people and destroy the Phantom Troupe, even if he must sacrifice his life in the process.

He is voiced by Yuki Kaida in the Japanese version and Cheryl Mcmaster in the English dub.
Leorio

Leorio is a Hunter that befriended Gon during the Hunter Exam. In order not to give away too much of himself, Leorio superficially claims that his reasons for becoming a Hunter are money alone. However, his true motive is to become a doctor. After losing a friend to a curable illness that he could not afford the treatment of, Leorio dedicates himself to becoming a Hunter so that he can pay for the costs of medical school and medicines to treat the poor for free. A loyal, trustworthy ally who greatly values the ties of friendship, Leorio acts like the big brother of the group. Though he is often outshone by the genius combat abilities of Gon and Killua, it should be noted that compared to the average man, Leorio is indeed very powerful. He is physically stronger than Gon (when neither are using Nen), and Leorio mastered the Nen principles of Ten and Ren without a professor—a feat that none of his other friends can attest to.