After she first appeared in Attack of the Clones, The Clone Wars would later delve into Barriss Offee's story and her friendship with Ahsoka Tano.
However, as time passed, she became increasingly convinced that the Jedi Order had lost its way. Radicalized, she bombed the Jedi Temple and framed Ahsoka before later admitting she was behind the attack.
That may have resulted in her old friend's freedom, but the damage was done and Ahsoka left the Order...reinforcing Anakin Skywalker's own growing frustrations with his Masters.
Tales of the Empire finds Barriss behind bars. She sees the attack on the Jedi Temple and is later made an offer by Lyn, a fellow Jedi who is now the Sith Inquisitor known as Fourth Sister.
Taken to the still partially constructed Fortress Inquisitorius, she's tested by The Grand Inquisitor and ultimately forced to kill another Jedi to earn a place there. We catch sight of Marrok (still very much alive here unlike in Ahsoka) and, now a full-fledged member of the group, Barriss dons a helmet and watches as Darth Vader enters to oversee his new minion. Long live the Empire!
In the next episode, Barriss and Fourth Sister are on a mission to track down a rogue Jedi. At this time, the former Jedi clearly thinks the Empire is a force for good and believes they were right to wipe the Jedi out.
However, after the villagers lie about the Jedi's whereabouts, she's horrified to see Lyn strike them down with her lightsaber. Later turning on her fellow Inquisitor, Barriss declares herself a Jedi and sends Fourth Sister packing before vowing to help the injured Padawan.
When episode 6 begins, a fair bit of time has passed since we last saw her and Barriss is now older and working as a healer. A Force-sensitive child is brought to "Wise Mother" by a family eager to escape the Empire, but it's then that Fourth Sister appears.
They have a brief verbal and physical altercation and Barris allows her to continue the hunt. However, she also warns the Inquisitor that ruin lies on the path she follows, a prediction which proves correct.
While the family escapes, Fourth Sister is lost in the ice caves and inadvertently stabs Barris when she comes to help. Explaining that Lyn can only leave if she renounces the Dark Side, it looks like the villain is doomed...until she promises to help the Jedi, leaves her lightsaber behind and exiting the cave with Barris in her arms.
Could there be a chance she survives? It seems that way, but the episode ends on a cliffhanger, leaving us in the dark about the fate of both characters...