Sammy Jones
From Tardis Wiki, the free Doctor Who reference
Sammy Jones was the younger brother of Eliza Jones. He was a fan of Charles Abbott's books.
In 2016, when he was eleven years old, he went to an event where Abbott did book signings. Abbott used a pen made of Incredulitas 4 to transport him to Antagonista. Abbott then wrote a series of books based on Sammy's adventures on the planet. The Twelfth Doctor learned of Sammy's problem, and went to Antagonista and rescued Sammy from zombies native to the planet. He then took Sammy back to Earth. (COMIC: Shock Horror)