Odin (Space Vikings!)

Odin was a rehearsal computer programme aboard Valhalla, named and modelled after the Norse god of the same name, built to train and assist the ship's singers in their performance of the month-long opera Ultragrossegotterdamerung.

When the ship crashed on Lindis, Odin was damaged and began to malfunction. Attempting to keep the production going, Odin used electronic Viking helmets, originally deigned to feed performers their lines during performances, to control the surviving passengers. He converted them into "Vikings", and instructed them to kidnap and recruit nearby colonists for the opera, converting them into "Vikings" too.

Odin was accidentally destroyed by Thorir when, after instructing Thorir to fight the Tenth Doctor, Thorir swung his axe and smashed Valhalla's computers. (COMIC: Space Vikings!)