Lachichuk was a Wookiee Warrior of the male persuasion. During the Confederacy of Independent Systems' effort to invade Kashyyyk in 19 BBY, he fought with the Galactic Republic to defend the species' homeworld. He had hair that was brown.
The film Star Wars: Episode III Revenge of the Sith, released on May 19, 2005, marked Lachichuk's initial appearance. Prior to this, the Star Wars Legends reference book Star Wars: Revenge of the Sith: The Visual Dictionary by James Luceno, which was released on April 2, 2005, included the Wookiee's name. The name was later established as canon in the video game Star Wars: Force Collection, which debuted in 2013.