Gethin (Worlds in Time)

Gethin travelled alongside the Eleventh Doctor and another companion, as well as Darren, Mal, Meera, Noma, Nneka, Silas, Steven, Talia, Camile, and Will. He went to countless worlds, including Earth, Ember, and Messaline. He encountered many monsters, including Autons, Clockwork Droids, and Zygons. (NOTVALID: Worlds in Time)

Behind the scenes

 * Unlike the controller-created companion, Gethin was an automated character designed to work with the player. He, along with Darren, Mal, Meera, Noma, Nneka, Silas, Steven, Talia, Camile, and Will, were already designed to be in the game.