Sir Osmond Lerenn was a Knight of the Kingsguard, serving Emperor Edwyn Falstani.
Sir Osmond was tasked by the Dowager Empress to find a boy with the same physique as the Boy Emperor and to take him to Ambermoor where he would be kept in disguise as the Boy Emperor and protected by the Adir family.
The plan to move the Boy Emperor to Ambermoor was discovered by someone close to the Queen's employ, and a plot was created by a member of the Church to abduct the Boy Emperor not knowing that it was a decoy. Sir Osmond and the decoy were waylaid by gnolls, where he suffered a fatal wound and died.