Tohri Challon was a Human who was loyal to Roan Fel and his Empire-in-exile. Challon originally served Emperor Fel in the capacity of Imperial Adjunct and greeted Vikar Dorn when he arrived with the Imperial Star Destroyer Dauntless. However, as the Second Imperial Civil War progressed, she was elevated to the rank of admiral. She was in command of the Dauntless when Emperor Fel met with the Jedi Order on Agamar, and she died in his service while preventing a strike force from assassinating him.
In 137 ABY, Imperial Adjunct Tohri Challon was present at the Imperial headquarters on Bastion, the seat of power of the deposed Emperor Roan Fel and his Empire-in-exile. She personally welcomed Vikar Dorn, Governor of Munto Codru, during the supposed defection of the entire crew of the Imperial Star Destroyer Dauntless. The defection, however, was part of a Sith plot orchestrated by Darth Maladi, a Sith Lady, to have Emperor Fel assassinated by a Sith Lord named Darth Kruhl.
As the Second Imperial Civil War progressed, Challon was given the rank of admiral and took command of the Dauntless, now part of the Fel loyalist Navy. The Dauntless transported Emperor Fel to the agricultural world of Agamar, a planet on the edge of Fel-controlled space, for a meeting with members of the Jedi Order. Captain Basile was her second in command.
Moff Nyna Calixte, Director of Imperial Intelligence, made her way to Agamar and interrupted the meeting with the Jedi to warn the Emperor that the Sith had had sent a strike force to capture him. At the same time, the Sith-loyalist Star Destroyer War Hammer, under the command of Moff Rulf Yage, emerged from hyperspace and engaged the Dauntless. Challon ordered her entire crew to engage the Sith forces in order to buy time for Emperor Fel to evacuate the planet.
In the course of the battle, the Dauntless suffered heavy damage and lost its shields. Nonetheless, Admiral Challon ordered her crew to continue attacking the enemy to provide cover for the Emperor's shuttle, allowing it to escape to hyperspace. As the shuttle took the Emperor to safety, Challon paid her respects to her monarch, and hoped he would remember that she had always been loyal to him. The Dauntless was finally overwhelmed by the War Hammer and was destroyed. Challon and her entire crew perished in the explosion. Afterward, Fel quietly voiced a farewell to her and his lost soldiers, wishing for them to go with the Force.
The coup that deposed Roan Fel and elevated Darth Krayt to Galactic Emperor led to a schism within the Imperial hierarchy between those who believed their allegiance had to remain with the throne, regardless of the person seating on it, and those who professed loyalty in the Fel dynasty; Tohri Challon was part of that second group. Challon was a loyal follower of her monarch and joined his resistance against the Sith Empire, serving him even at the expense of her own life. She remained stoic as she knowingly faced her death and hoped to be remembered for her loyalty.
Challon wore her black hair in cornrows and sported a circular tattoo on her forehead and tattooed lines on her cheeks. While on Bastion, she wore robes and had manicured fingernails.
- The Complete Star Wars Encyclopedia