Use Riff to hit Kairiky at full health with a Unite move and instantly die. He has so little sense that he really has the intelligence of a caterpillar.

When you encounter an enemy in Inadorami Raidon, you will perform a special attack and give experience points to the enemy. He's such an unfortunate person that you can't tell if he's a good enemy or a bad one who does nothing but farm until he finds an enemy.