Dwynn Biuval functioned as a sales representative for the Corellian Engineering Corporation and was active during the Galactic Civil War era, specifically the time period. In the aftermath of the Battle of Yavin which occurred in 0 BBY, Biuval desired to furnish a political contribution to Diktat Daclif Gallamby. To circumvent any undesirable attention, Biuval opted to donate to the Commission for the Rehabilitation of Unwanted Krahbu as an indirect method of payment to Diktat Gallamby.
Dwynn Biuval existed as a non-player character within the video game Star Wars Galaxies: An Empire Divided which was released in 2003. This game was a massively multiplayer online role-playing game that was developed by Sony Online Entertainment and published by LucasArts. The game was ultimately shut down on December 15, 2011.
Since Dwynn Biuval utilized the standard "noble" template for its creation, Biuval's visual representation was randomly chosen from a pool of forty-two potential appearances. The species that Biuval could manifest as included Bothans, Humans, Rodians, Trandoshans, Twi'leks, and Zabrak, and could be either gender. Given that the quest text contained no details about Biuval's physical traits, the definitive canonical species and gender of Biuval remain undetermined within the Star Wars Legends universe.