Pollux was a fictional character from the storybook The Kingdom of Elysian, written by Benny Russell. In the story, Pollux was a wizard in the Kingdom of Elysian, and secretly the brother of Caster.
In 2259, as the USS Enterprise concluded a routine survey mission of the Jonisian Nebula, an entity, later named Debra, brought a version of the story to life from Rukiya's mind, in which Lieutenant Spock took on the role of the Wizard Pollux. (SNW: "The Elysian Kingdom")