At first, Leorio is known for being a money-grubbing idiot he is. But as the stroy goes on, his real intentions was revealed.
He wants to become a doctor to help people. And of course, he needs a lot of money to do that. After the hunter test, Leorio goes of to study in becoming a doctor.
Leorio and Kurapika are quite close even though they criticize each other. It is because Leorio thinks that Kurapika is a much better person to talk with and Kurapika also thinks the same. (And also the fact that Gon and Killua are kids ^_^)
Leorio is the same as Gon, stubborn and has a great sense of humor but a bit different because he is quite fond with girls. He always asks the age when he sees a girl *_* Leorio is not an action type guy, but goes into one when it is really needed.