The Alderaan Guard, also known as the Alderaanian royal guards, were a security force responsible for the protection of members of the House of Organa, the royal family of the planet Alderaan.
The Alderaan Guard accompanied the royal family in all their travels
During the Clone Wars, Alderaan Senator Bail Organa was attacked in a parking garage by several thugs wanting to stop him from giving a speech in the Senate. Organa pushed an emergency button summoning several guards and the Coruscant Police. Though the thugs were arrested, Organa's speeder crashed and he was severely injured. The guards notified Senator Padmé Amidala before taking Organa to a hospital.
In 3 BBY, Princess Leia Organa talked to one of the guards about their baby, who had begun sleeping through the night, before she began her Day of Demand ceremony.