Hattie Munroe was the lead member of the Space Pirates. (PROSE: Christmas Special) She was a native of the Twist in the 40th century and a brief travelling companion of the Twelfth Doctor. (COMIC: The Twist)
After one of her concerts, the Twelfth Doctor took her bass, so she began following him. Later, Hattie and the Doctor met Jakob, who had been accused of killing Idra Panatar, but claimed to be innocent. The three started investigating what happened, and met the Foxkin, a race who kept their existence unknown to the rest of the Twist. As the Doctor, Hattie and Jakob had found them, the Foxkin said they would have to be either killer or imprisoned. They were sent to jail, but managed to escape.
While travelling together, the Doctor and Hattie were playing their guitars together, when Hattie warned the Doctor that the TARDIS was making a noise. When the Doctor discovered the cause of the noise, he said it was an emergencial landing. When the Doctor and Hattie left the TARDIS, they found an abandoned house. Despite Hattie's desire to return to the TARDIS, the Doctor insisted upon going inside it and finding out what caused the TARDIS to land. (COMIC: Playing House)