Anahita
From Tardis Wiki, the free Doctor Who reference
Anahita was the queen consort of the Autarch Siris. Because she had previously met him when she was known as Idra, she sent the Fifth Doctor the message "Idra" to entice him to visit the Archipelago of Sirius. (AUDIO: The Children of Seth [+]Loading...["The Children of Seth (audio story)"])