The Human Sergeant Wallen was among the stormtroopers under the command of Colonel Dyer who were stationed on the Forest Moon of Endor during the construction of the orbiting second Death Star in the year 4 ABY. His unit was recommended to Commander Igar of the Imperial Army unit Tempest Force by Governor Yount of the Wakeelmui garrison.
Wallen and another stormtrooper escorting Luke Skywalker into a lift.
During the early stages of the Battle of Endor, Wallen and another stormtrooper were present at a landing station on the moon when Dark Lord of the Sith Darth Vader arrived from his Lambda-class shuttle ST 321. The pair of troopers accompanied Darth Vader down a turbolift, and waited inside the lift as the Dark Lord went to meet Commander Igar, who brought recently captured Rebel Commander and Jedi Luke Skywalker to Lord Vader. After a conversation between the Dark Lord and the Rebel, Vader motioned for Wallen and the other trooper to escort Skywalker into the lift and bring the captive to the shuttle, which then brought both the Dark Lord and the Rebel to the Death Star.
Wallen wore full white stormtrooper armor. He wielded a standard E-11 blaster rifle.
Wallen first appeared as an unnamed character in the Return of the Jedi novel and the film Star Wars: Episode VI Return of the Jedi, in which an unidentified extra portrayed his character. He was given a name and brief backstory in the 1999 Endor Limited edition of the Star Wars Customizable Card Game.
- LEGO Star Wars II: The Original Trilogy
- LEGO Star Wars: The Complete Saga
- The Art of Star Wars Episode VI: Return of the Jedi
- Star Wars: Return of the Jedi Coloring Book (Luke Skywalker)
- Star Wars: The Annotated Screenplays
- Star Wars: Behind the Magic
- Star Wars Customizable Card Game — Endor Limited
- The Official Star Wars Fact File111
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- The Complete Star Wars Encyclopedia