Acestes said that the Lepharists in Azoturan are the elite of elites, and while they are only in Elysea now, they will soon infiltrate Asmodae. And as he suggested thinning their numbers before that happened, you eliminated the Azoturan Fighters, Azoturan Outriders, and Azoturan Assassins and took their insignias to Acestes as proof.