This is Leon the Lion (yep, i broke my head thinking the species of this one!!! XD), brother of Maria, step-brother of Firion, and one of the four heroes who destroyed the Palamecia Empire. At the beginning of the adventure he was kidnapped by the Palamecia Empire and brainwashed, turning him into the evil Dark Knight, who destroyed many towns and villages, and killed a lot of innocent people. Later on he comes back to his senses thanks to Firion, Maria and Guy, but he'll never forget all the terrible actions he did and innocents lives he took while he was the Dark Knight.