Halagad Ventor was a male Human Jedi Knight who was trained at an unusually late age, due to the fact that he was passed over for training initially during his childhood on Alderaan. Jedi Master Everen Ettene eventually agreed to take him as a Padawan at the Almas Academy. Since the nature of his training was unnatural, Ventor’s actions as a Jedi were considered unorthodox, and he neglected the more subtle aspects of the Force. These shortcomings may have contributed to his botched peace talks in the Virgillian Civil War, where he and his team were erroneously reported dead during the Separatist Crisis.
Ventor served as a Jedi General during the Clone Wars, and was a recipient of the Medallion of Honor. Under the leadership of Obi-Wan Kenobi, he helped liberate the planet Skye from Zeta Magnus, a genetic terrorist, during which time he engaged in a Concordance of Fealty with Anakin Skywalker. Later in the Outer Rim Sieges, Ventor commanded a team which included Sha Koon assisting to purge the Confederacy of Independent Systems from the planet Bal’demnic. Surviving Order 66, Ventor teamed up with Jedi Master Ashka Boda to establish a network of fellow surviving Jedi. He was soon captured by the new Galactic Empire and interrogated by former protege, Darth Vader. Ventor was forced to reveal the secret location of his hidden Jedi network. He eventually escaped Vader and fled to Trinta, where madness and the dark side of the Force consumed him.
After many years, a band of Rebel Alliance scouts crash landed on Trinta and were terrorized by Ventor. After enduring several Force attacks, the Rebels confronted Ventor and drew him out of the dark side. Deceased yet redeemed, Ventor would persist in the Force as a Force ghost, and would guide survivors of his betrayal years after his death.
Ferus Olin was the Human Jedi Padawan of Jedi Master Siri Tachi. Considered very mature for his age by many Jedi, Olin was well-respected for his dedication to the Jedi Order. He often clashed with fellow Padawan learner Anakin Skywalker, who disagreed with his strict adherence to Jedi rules and protocol. The two and their masters, Tachi and Obi-Wan Kenobi, often worked together on missions, traveling to such varied worlds as Radnor, Euceron, Andara, Typha-Dor, Romin, Falleen, and finally, Korriban. Many of these missions were orchestrated with the goal of capturing the escaped scientist and criminal Jenna Zan Arbor, who the Jedi later discovered was working with Granta Omega, the murderer of the Jedi Council member Yaddle. However, Zan Arbor consistently eluded them.
Shortly before the onset of the Clone Wars, Olin resigned from the Jedi Order due to the guilt he felt over the inadvertent death of fellow Padawan Darra Thel-Tanis on Korriban, where Omega was finally killed in battle with Kenobi present. Eventually, he befriended Roan Lands on Bellassa, and the two started a business together—Olin and Lands. Olin and Lands would produce fake, brand-new identities for anyone that wanted to escape from the empire. Olin grew fond enough of Bellassa to adopt it as his homeworld.
Soon after the execution of Order 66, Olin founded a rebel organization on Bellassa in opposition to the Galactic Empire, newly in control of the galaxy. He would later retrain himself in the Jedi ways with the aid of Obi-Wan Kenobi, one of the few Jedi to survive the Great Jedi Purge. Olin also created a safehouse for fugitive Jedi on an asteroid hidden within an atmospheric storm. Here he would begin to form the early stages of the Alliance to Restore the Republic. During his search for Jedi refugees from the Empire, he was blackmailed into aiding Emperor Palpatine, but would act as a double-agent, seeking information and attempting to undermine the Empire from the inside, eventually confronting Darth Vader himself. His resistance movement spanned the galaxy from Bellassa, Acherin, Coruscant, Naboo, Samaria to Alderaan as well as other planets. This lasted until the Empire thwarted his plans for early rebellion by destroying his secret asteroid base. He eventually accepted a mission from Obi-Wan to watch over Princess Leia Organa on Alderaan where he would reside for many years until Darth Vader killed him a year after that planet was completely destroyed.