Issue number 13 of the Star Wars Rebels Magazine, part of the Star Wars Rebels Magazine collection and published by Egmont UK Ltd, came out on December 30, 2015. This edition featured "Secrets of Sienar", a brand new comic story created by Martin Fisher together with Eva Widermann.
- An introduction to the characters in the show, called Meet the Rebels
- Secrets of Sienar
- A page of information about R2-D2
- Information about the AT-TE vehicle
- Puzzles and activities
- Pictures for your wall
- A look at what's coming in Issue 14