Resi was a young Human male, specifically a Je'daii initiate within the Je'daii Order located on the planet of Tython. Resi, a male born in 25,805 BBY following the conclusion of the Despot War—a war fought between the Je'daii and the Despot Army led by the Despot Queen Hadiya—possessed blond hair, brown eyes, and light skin adorned with freckles. This Force-sensitive youth received training from the Je'daii Order on Tython. In 25,793 BBY, he and a fellow initiate, Harun, were present as Temple Master Ketu lectured them on the Order's past. After Ketu finished his story, Resi declared his hatred for Hadiya, which led to a scolding from Harun. However, Ketu reminded the two children that Hadiya was not completely without virtue. Even with Ketu's warning that they should acknowledge their similarities to Hadiya, Resi refused to believe that he could ever share any traits with her.
The character of Resi made his debut in the first issue of the Star Wars: Dawn of the Jedi comic book series, titled Force Storm 1.