Doallyn was a Geranite male hunter in the service of Jabba Desilijic Tiure, the crime lord, within his criminal empire. During 4 ABY, in that year, Doallyn was present within the court of Jabba's Palace situated on the planet Tatooine when the rebels Leia Organa and Chewbacca made their entrance, with Organa disguised as the bounty hunter known as Boushh. Attempting to intercept them, Doallyn hurried up the staircase that led into the court room, but he approached Chewbacca too closely, who retaliated by throwing the hunter against the wall at the staircase's base. Subsequently, Doallyn collapsed onto the floor, then managed to sit up on the stairs as Organa and Chewbacca walked past him into the court room to converse with Jabba. Doallyn was easily recognized due to the large black helmet that completely concealed his head. Furthermore, he was attired in black clothing and communicated in a language distinct from Galactic Basic Standard.
Doallyn's initial appearance occurred in the original trilogy film Star Wars: Episode VI Return of the Jedi which was released in 1983. The character's name was first established in current canon within the 2018 reference book titled Star Wars: Geektionary: The Galaxy from A - Z, even though the name Doallyn actually came from the Star Wars Legends story Skin Deep: The Fat Dancer's Tale from 1996, which was authored by A. C. Crispin.