Kaim Argonar is the main protagonist and one of four immortals playable in Lost Odyssey. He is the most prominent subject of A Thousand Years of Dreams. Much of the game's progression is driven by Kaim's struggle to recall his memories, which come to him in the form of dreams, and the questioning of their veracity. While Kaim's social behavior undergoes transformation throughout the course of the game, certain profound aspects of his character, such as his ability to express empathy despite his desensitization to human struggles and death, remains intact even beyond the very end.