Luke is the only son of a Duke of the Kingdom of Kimlasca-Lanvaldear. He lost all memory of his childhood due to the shock of being kidnapped. Since his return he has been a prisoner in his own palace, but his family's wealth has kept him in comfort. This has led to his becoming spoiled and naive.

His only hobby is practicing with his sword, and, though he lacks refinement, he does possess some skill.