Thexan

"Wonder how things'd be different if Arcann's twin took the throne." "Thexan? Haven't thought about him in a long time, may he stay at rest." "Saw him at a ceremony once, in my life before. Calm and unwavering. Strong. Wouldn't have put the Heralds in charge of the Old World." "Like letting lunatics watch over a madhouse."

- Two residents of Breaktown reminisce over the fallen Thexen.

Thexan was a Force-sensitive male Human who served the Eternal Empire. He was the son of Emperor Valkorion and Senya Tirall, and fought many battles on the Eternal Empire's behalf. He fell in a brief lightsaber duel with his twin brother, Arcann.

Biography
Thexan was the son of Emperor Valkorion of the Eternal Empire and Senya Tirall, one of the Knights of Zakuul. He and his twin brother Arcann were trained from childhood to be warriors, with Thexan always being there in harsh times. The twins and their younger sister, Vaylin, ignored their mother, but their father ignored them as well when they were children. Arcann grew more resentful towards their father, despite Thexan's attempts to placate him.

In 3640 BBY, During the invasion of the galaxy, Arcann lost his arm and received heavy scarring to his face during an attack on a Sith world, with Thexan being by his side after the injury. Arcann had become furious when, after he and Thexan presented the lightsabers of the fallen Jedi and Sith as trophies from the battle to their father, Valkorion turned away in silence, and overcome by the dark side of the Force he attempted to attack the Emperor. Thexan pulled his brother back. Arcann turned his attention to his brother and struck out at him, but their brief duel ended when Thexan was struck down by his brother with a cut across the stomach, killing him. Coming to his senses, Arcann cradled his twin's body in his arms before looking up to see Valkorion looming over him, asking his remaining son to come with him.

A funeral was later held saying that he was killed in the Core Worlds. The truth of his death remained unknown to everyone, including Senya, for five years, until Vaylin told her the truth during the Battle of Asylum.

Behind the scenes
Thexan first appeared in Sacrifice, a cinematic trailer produced by Blur Studio for Star Wars: The Old Republic fifth digital expansion, Knights of the Fallen Empire. The trailer was released at the Electronic Eterntainment Expo on June 15, in 2015. While not named in dialogue, Thexan's name can be seen in Aurebesh on his crib at the beginning of the trailer.