Artrix (OU)

Artrix was a Void Knight who worked for the Shadow Proclamation. She commanded a ship called the Night Ruby, which is the weirdest name in the world. She first appeared fighting Zev Raregroove on an unknown planet. After a long time spent fighting Zev (and one fake name, which Zev believed for all of two seconds), she seemingly sacrificed herself to send a planet which was about to be destroyed to another dimension. She managed to pass on one final message to Zev. "You are not alone." The significance of this is unknown. She later somehow appeared again before and during the Battle of Judoon, and played a vital role in it, despite DYING EARLIER ON. She then appeared again on Bara Magna with a squad of soldiers and killed the Vrai commander Tryxas and his troops, and then had his cruiser shot down. Later, she tried to arrest Blackout, and got killed for her troubles. She returned and attacked Blackout again, only to be beaten and then forgotten about.

Trivia

 * When Artrix first appeared, Zev confused her with Lariska, a BIONICLE character.