He was portrayed by Liam Cook.
Born on the planet Bestoon, Ochi was an associate of Yupe Tashu and a member of the Acolytes of the Beyond, a group of liberals devoted to the collection of Sith artifacts. A Jedi hunter since the Clone Wars, Ochi became an assassin obsessed with finding Sith relics. At some point, he obtained the droid D-O from one of his victims.
Eventually, he was promoted as a Sith loyalist under the Sith Eternal cult by the resurrected Darth Sidious. He was tasked with obtaining Sidious' granddaughter, Rey, who was chosen by Sidious to replace him as the next Dark Lord of the Sith. Knowing of his father's intentions, Sidious' son and daughter-in-law hid Rey on Jakku under the custody of Unkar Plutt. When Ochi integrated them, they refused to surrender their daughter's whereabouts, prompting Ochi to stab them to death with his dagger.
Sometime after killing Rey's parents, Ochi was tracked by Luke Skywalker and Lando Calrissian, as his dagger was rumored to contain Sith writing that detailed the possible location of Exegol, the location of Sidious' secret Sith base. The two pursued Ochi to the desert planet Pasaana, where he got trapped in the sinking sands of the Shifting Mires and perished within the caverns below.
Ochi plays a posthumous role in the film, where the Resistance members find themselves in the Shifting Mires after running from the First Order. They find the remains of Ochi, having been picked clean to the bone by gouge beetles, and his dagger. After escaping from the tunnels with the help of a Vexis, they use Ochi's abandoned ship, the Bestoon Legacy, to escape from the Knights of Ren and look for someone who could decipher the Sith inscription on the dagger, revealed to be the location of the Wayfinder in the ruins of the Second Death Star on the Kef Bir moon of Endor.
While little is seen of Ochi in the flashback that Rey has about him, it is shown that he was sadistic, obsessed with using brute force to claim what he seeks. From the jittering and fear expressed by D-O, it can be assumed that Ochi abused him.
- It is unknown how exactly Ochi died in the Shifting Mires. It is possible that it was the Vexis that killed him, given that its wound could have come from his dagger.