[Source] Baron Aryan La Valette is an exclusive character of The Witcher 2: Assassins of Kings. Aryan is the son of Baroness Luisa La Valette and "Old Baron La Valette". He is the half-brother of Anaïs and Boussy. Aryan initially appears during the castle assault part of the Prologue, where Geralt can kill him and his men, duel him to the death or force him to surrender. Should Geralt choose to kill him, that is the end of their interaction.