Minamoto Kouji is one of the five Chosen Children who had received elemental spirits from the world of Yggdrasil. He, opposite of his dear twin brother, was blessed with being the Legendary Warrior of Light. Thrown into that world, it was there where he learned of having a twin, and through the efforts of his friends and Takuya, were able to free him from the clutches of Cherubi and restore the Darkness to its Purified self.