Hunters are licensed, elite members of humanity who are capable of tracking down secret treasures, rare beasts, or even other individuals. They can also access locations that regulars cannot access

Nen is the ability to control one's own life energy or aura, which is constantly emitted from them whether they know it or not. There are four basic Nen techniques

After Gon and the others convince Killua to rejoin their side, Leorio and Kurapika depart temporarily for their own personal reasons