Gon Frecss
Gon Freecss is the primary protagonist of Hunter × Hunter. He is the son of the famous Hunter, Ging Freecss. He is on a quest to find his father.
Killua Zoldyck
Killua Zoldyck is the deuteragonist and best friend of Gon Freecss in the series Hunter × Hunter. He is the middle son of the Zoldyck Family.
Kurapika
Kurapika is one of the four main protagonists in the series Hunter × Hunter. He seeks vengeance for his bloody past, and his eyes glow a beautiful and coveted scarlet when emotional.
Leorio Paladinight
Leorio Paladinight is one of the four main characters of the Hunter × Hunter. He becomes hunter becasuse he wants to be a doctor in order to help the poor.
Hisoka
Hisoka is a character from the series Hunter × Hunter. He is also one of the main antagonists. Hisoka looks similar to that of a magician or jester. He has fun with killing people or fighting with someone who have powerful ability.
Kite
Kite is a Contract Hunter who was trained by Ging Freecss. He is the first character shown in the manga. He is actually not the main protagonist but later reappeared the dominant role in the Chimera Ant arc. As a Chimera Ant she is Meruem's twin sister and a member of its royal family.
Credit : http://www.ntv.co.jp/hunterhunter/character/index.html