Why don't Kulapika and Lei Ouli, two full-time hunters, go to the Island of Greed?

Kula Pica stayed with the boss, because the boss's daughter lost the ability of divination, and the boss was devastated. Kulapika is the most capable person under the boss, so he stayed to help. He is not interested in greedy island.

Leo goes to study and wants to be a teacher or a doctor.