Thule

Thule was the Tarisian jedi twin of Jaarik, who also fell to the dark side. His lightsaber as a jedi was orange. He was much more tuned in the force than many members of the cult.

Sithdom
"Thule?! No, it can't be!" "Hah! You know the truth, jedi!" "You were stationed here last week! How?" -jedi master Akara Vallus and Thule just before their duel.

Thule followed his brother into Jad Rayne's Sith Cult. His robes were similar to Jaarik's, but blue instead of crimson. His lightsaber was a light shade of red.

Death of a Sith
"Ah!!" "I'm sorry, Thule. It shouldn't have ended this way." "Hah! You know my brother will never give up hunting you, Vallus!" -Thule's last words

Minutes before the Assault on Chandrila, Akara Vallus caught up with his best pupil's brother. Thule was on his way back to the main tomb from a patrol, and unfortunately Akara's drop pod landed right down a rabbithole that led down to the ledge where the sith stood. Thule sensed the disturbance and rezlized that a team of jedi were near, and began setting off to tell lord Rayne. Akara stopped Thule just around the corner from the entrance to the tomb, which also served as the jedi strike force's meeting place. The two dueled, and soon it was apparent that Akara was more profiecent in lightsaber combat. Akara disarmed his opponent with a uppercut and, as Thule continued to attack with the force, was forced to kill the sith. As he slid down the wall, Thule spoke his last words. "Hah! You know my brother will never give up hunting you, Vallus!" Later, as the scene was looked back upon by Akara, jedi masters Luke Skywalker and Po Rulok and jedi archivist Tionne, it was said that had Thule succeded in both killing Vallus and telling Rayne, the battle would have been lost.