A young dragoon who appears in the tales of a blue planet watched over by two moons. Kain is the commander of the Kingdom of Baron's elite squadron known as the Dragoons. Not only is he Cecil's best friend, but also his amicable rival. He is extremely proud and has a strong sense of justice, but lacks the ability to express his emotions well. Disappointed with the unjust actions of the king, both him and Cecil leave Baron and go their separate ways. However, upon reuniting with one another he challenges Cecil to a duel, and continues behaving rather strangely henceforth.
A young dragoon who appears in the tales of a blue planet watched over by two moons. Kain is a proud dragoon whose dignity will not allow him to fully express his emotions. He is in love with his childhood friend Rosa, but knowing that she loves Cecil instead has lead him to keep it a secret the entire time. Golbez sees this as the perfect weapon to manipulate Kain, resulting in the dragoon's betrayal of Cecil and company. Once Kain finally returns to his senses, he fights alongside his friends whilst his feelings of guilt still haunt him.
A young dragoon who appears in the tales of a blue planet watched over by two moons. His emotional weakness was exploited by Golbez, betraying Cecil and the others twice as a result, but no one considers this act more disgraceful than Kain himself. After coming back to his senses, he learned Golbez was being controlled by the true mastermind, Zemus, and resolved himself to settle everything at the final battle.