Born to a royal family in Kessurian society, Wilsa Teshlo was a thilas, being second in line to the throne. However, Teshlo refused to be trapped in a life of royalty, and fled the royal palace. After Teshlo's disappearance, many assumed that she was kidnapped by pirates, though that was not the case—when Teshlo eventually joined the Veiled Sorority pirate gang, she did so willingly. As a privateer in the Veiled Sorority, Teshlo flew a BTA-NR2 Y-wing starfighter, targeting corporate haulers that worked for the First Order. On one occasion, Teshlo fired upon another vessel from her Y-wing while flying through an asteroid field.
In 35 ABY, during the war between the First Order and the Resistance, Teshlo was one of many unaffiliated individuals that received a call for help from Lando Calrissian of the Resistance, requesting reinforcements in their battle against the Sith Eternal's forces. Joining a fleet comprised of many similar unaffiliated pilots, Teshlo made her way to the planet Exegol in the Unknown Regions, entering the battle alongside the Resistance. Once the Sith Eternal's fleet, the Final Order, was destroyed, Teshlo returned to the Resistance base on the jungle moon of Ajan Kloss to celebrate the victory among the Resistance and other participants of the battle.
A Kessurian female, Teshlo had red skin, brown hair, and orange eyes. She refused the trappings of royalty, despite it being her birthright, preferring to instead become a pirate. While Teshlo attempted to stay uninvolved with the galactic war between the First Order and the Resistance, she eventually assisted the Resistance in defeating their enemies at Exegol.
Before joining the Veiled Sorority, Teshlo received elite private pilot schooling, and used her skills while working as a pirate.
Teshlo wore a white flight suit, with a blaster holstered onto her belt. While part of the Veiled Sorority, she piloted a BTA-NR2 Y-wing starfighter. While in flight, Teshlo wore an antiquated K-22995 light flight helmet.
Wilsa Teshlo was portrayed by Latesha Wilson, a creature and droid perfomer, in the 2019 film Star Wars: Episode IX The Rise of Skywalker, and was first identified in the accompanying reference book Star Wars: The Rise of Skywalker: The Visual Dictionary, written by Pablo Hidalgo and released alongside the film on December 20, 2019. Teshlo's design was created by Jake Lunt Davies, originally for a Kijimi resident, with Calum Alexander Watt then producing a costume concept of the character for the rebel base. The prosthetics were sculpted by and makeup by .