Carlyle

Carlyle was the leader of Jehanna's army. However in the events of Fire Emblem: The Sacred Stones he betrays Jehanna and helps the Grado Empire take over Jehanna Hall (the capital castle of Jehanna). Carlyle is not an evil man however, he had been deeply in love with the Queen of Jehanna, Ismaire. Carlyle was told by Caellach that if he helped Grado take Jehanna Hall he could have Queen Ismaire for himself.

After Grado has captured Jehanna Hall the Caellach is told that Princess Eirika and her forces are aproching. He then tells Carlyle to defend Jehanna Hall if he wants to see Queen Ismaire again. So Carlyle leads the Grado forces in defending Jehanna Hall. He is killed during the battle.

Ironically, during the battle to defend Jehanna Hall Caellach (who had noted that he didn't kill or harass women like Valter) kills Queen Ismaire in order to take the sacred stone of Jehanna.