Taron Malicos was a human male Jedi Master who served the Jedi Order and the Galactic Republic as a Jedi General during the Clone Wars. During Order 66 in 19 BBY, he was attacked by his clone troopers but escaped to the planet Dathomir using his starship. Malicos encountered Brother Viscus' Nightbrothers and was soon captured by them. While in captivity, Malicos fell to the dark side of the Force and began to manipulate the Nightbrothers, pitting them against each other. He fled from his Nightbrother captors but was eventually recaptured, and his killing of several Nightbrother warriors caused others to bring the former Jedi before Viscus. By killing Viscus in a fight, Malicos became the leader of his Nightbrother clan.
Malicos began influencing the Dathomirian Nightsister Merrin to learn her magick art, telling her that the Jedi had conducted the Battle of Dathomir when, in truth, the Confederacy of Independent Systems and its leader, the Sith Lord Count Dooku, orchestrated the battle by ordering the Kaleesh cyborg General Grievous to eliminate the Nightsisters. Malicos eventually encountered the surviving Padawan Cal Kestis in 14 BBY. Pretending to be a "Wanderer," he warned Kestis to stay away from the Tomb of Kujet, yet the Jedi declined and continued his journey to the tomb. After Kestis exited the ruins, Malicos questioned the Jedi's intentions but was countered by Kestis asking about his identity. The "Wanderer" then revealed himself as a former Jedi.
Malicos tried to turn Kestis to the dark side with the lure of Dathomir's power but was interrupted by Merrin. The Nightsister attacked Malicos and Kestis by unleashing Nightsister Zombies from the remains of her deceased sisters. However, both endured the attack. When Kestis later returned to Dathomir, Merrin concluded that Malicos had lied about the Jedi killing her fellow sisters, and in the Tomb of Kujet, the Padawan and Nightsister decided to confront Malicos. He tried to turn Kestis to the dark side again only for the Jedi to refuse, and the two engaged in a duel. Kestis won the duel with the help of Merrin, who buried and killed the fallen Jedi with her magick.
