Companion (Doctor Who) "Face the Raven", but in a subsequent episode ("Hell Bent") her time stream is frozen at the moment of death by the Time Lords so that they can interrogate her about the Hybrid; the Doctor takes advantage of this to save her life, but she remains technically neither alive nor dead, does not age or have a pulse. After her departure as a companion of the Twelfth Doctor, she teams with the immortal Ashildr and travels in a stolen TARDIS. Other companions died in alternate timelines or alternate lives. "Brigade Leader" Alistair Lethbridge-Stewart, "Section Leader" Liz Shaw, and "Platoon Leader"
Lady's companion Lady's companion A lady's companion was a woman of genteel birth who lived with a woman of rank or wealth as retainer. The term was in use in the United Kingdom from at least the 18th century to the mid-20th century but it is now archaic. The role was related to the position of lady-in-waiting, which by the 19th century was only applied to the female retainers of female members of the royal family. Ladies-in-waiting were usually women from the most privileged backgrounds who took the position for the prestige of associating with royalty, or for the enhanced marriage prospects