Sellaccc Orryak was a Trandoshan who led a biker gang known as the Ganguls on Tenoo.
Orryak was a resident of the planet Tenoo in the Outer Rim. At some point during the High Republic Era, she formed a speeder bike gang called The Ganguls, led by herself, with theAnzellan mechanic Toda-Joh and the Quarren Jooro "Speeds" Jarrot as members. The three of them rode into a small township known as Aklyrr Bend and managed to oust the mayor, setting themselves up as despots over the community. They began to take what ever they wanted from the townsfolk while residing in the mayor's office and employing the town's youth to steal from neighboring communities. The theft of a speeder from the town of Kublop Springs by one such youth, a human named Ori, whom Orryak knew by name, ended up drawing attention to the gang's operations.
Orryak became aware of this when a group of younglings from the local Jedi Temple entered the grounds of the former mayor's office after getting past Speeds. One of them loudly proclaimed that Speeds and the others were indeed the Ganguls and had a stolen speeder. The cleverness of the younglings amused Orryak as she emerged from the office. Speeds was instantly concerned for himself and apologized for not keeping them on the other side of the gate. She didn't reply to his apology, but approached the younglings and attempted to scare them away with a show of her weapon while suggesting they leave.
The younglings stood their ground and ignited their training sabers. Orryak laughed at how the younglings thought they could actually stop the Ganguls. Toda-Joh disarmed the younglings, and Orryak ordered Speeds to trap the younglings with an electric net. With the kids captured, Orryak told Speeds to lock them in the town's holding cell until the gang figured out what to do with them. She also instructed him to have Ori stand guard, indicating that the boy had shown himself to be competent.
Before the Ganguls could do anything to them, the younglings and townsfolk had amassed outside the mayor's office. Walking out to try to bring the town back into compliance, Orryak learned that Ori let the younglings out of the cell. She told him that he of all people should know better. Toda-Joh suggested that the gang flee as they were outnumbered, and Speeds echoed the sentiment. Orryak angrily told the town that if they want to drive them out, fine, but they'd regret it. The town replied that they just wanted their stuff back and the Ganguls out of Aklyyr Bend, and Arryak told them they'll get it back.
She then closed the gate and with the others loaded a bit of stolen property on a repulsorlift sled attached to the stolen speeder. She and the group broke down part of the wall around the mayor's office and tried to flee down the river but were pursued by the younglings and Ori. Approaching a waterfall, Toda-Joh pointed out a possible exit through a cave. Orryak turned the speeder hard, but it was too wide to fit through the cave entrance. Forced to leave the stolen property and speeder behind, she vowed that the Ganguls would return, and teach the town a lesson when they do. The Ganguls escaped their pursuers, but without the property they had acquired while in control of Aklyrr Bend.
After some time had past since being ran out of Ackla's Bend the Ganguls learned of an abandoned outpost on Denoo. Sellaccc hoped to obtain a ship and profit from selling the parts left there. Rather than risk the ire of the local Jedi or other authority by taking an honest vessel Sellaccc and the Ganguls ambushed the local pirate, Taborr in order to take his vessel- the Talon. The Ganguls did so rather easily given as Taborr was merely a youngling and his two compatriots fumbled at handling a smoke bomb sent there way. Having boarded the Talon the Ganguls made their way into the orbit of Tenoo. Once there Sellaccc instructed Speeds to set a course for Denoo only to have heard a transmission from the hall just behind the cockpit. That transmission having been Taborr scolding his compatriots for calling him during his attempt to retake the vessel. Hearing this Sellaccc confidently opened the door finding the prospect of him doing so unlikely. Speeds casually intervened by telling Sellaccc that he'd handle it and disarming Taborr. Sellaccc then attempted to take hold of Taborr who evaded her. She motioned to Speeds for the weapon and was provided such. Avoiding Taborr's repulsor blast she found an opening and took hold of him. The young pirate insisted he was still the captain and the Talon still his ship to which Sellacc told him that it wasn't anymore before locking him into a holding cell aboard the Talon. When Taborr's crewmates sent another communication they where face to face with Sellaccc who told them that Taborr had been captured and they'd be captured to if they tried to take him back.
Approaching Denoo Sellaccc went down to the holding cell to check in on Taborr who was in the midst of trying to break the force barrier with his repulsor bracelets. Frustrated at his inability to do so Taborr demanded to know who Sellaccc was. She instead replied, while kneeling down so as to see the young one eye to eye, that those who have taken his ship where the Ganguls and they had plans. She told him that the Ganguls have outgrown Tenoo and had big plans for the Talon- those being to become the greatest pirates in the sector. When Taborr claimed to be the greatest in the sector Sellaccc was humored and while leaving him told him "... what ever kid."
Upon landing on Denoo Sellaccc ordered the other Ganguls to collect and load droid parts onto the Talon. While waiting in the cockpit for them to finish she heard her captive shouting angerly and from such learned that the Jedi where there as Taborr berated his compatriots for bringing them. With a growl of agitation Sellaccc left the cockpit to see what was going on for herself. Apologizing for interrupting she demanded Taborr's compatriots leave. She then leapt with Taborr's weapon in hand towards EB-3 and attempted to land a killing blow to obtain more droid parts but failed. After seeing the Gamorian Pord scuttle off and hide Sellaccc began to become less outright aggressive and more toying in a stalking way. However as the crew evaded her hunting she became more and more agitated- eventually throwing all the loaded crates and parts out of the ship in an attempt to leave no place for them to hide. Even Taborr reached the point of telling his crewmates to give up and Sellaccc echoed that sentiment. It was at that point she fell for a trap and was captured in an empty crate by EB-3.
However the weight of the droid who put the crate over her was not enough to hold her. Sellaccc kicked both the droid and crate off her and became thrilled at having finally caught the two she had been hunting for. She pondered aloud what to do with them only for Taborr to demand she leave his friends alone. She demanded to know what he was gonna do about it from the cell with his friends so helpless but her delight was cut short when a scavenged droid reactivated by Taborr's crew triped her. While she was recovering from the fall the crewmates of Taborr freed him and she found herself in a fight as the three tried to take her on. Sellaccc threw the Pord against a crate and nearly lose an eye to Taborr's weapon before tumbling out of the Talon and onto the sands of Denoo. With the Jedi arriving Sellaccc and the Ganguls got to their speeder bikes (presumably loaded onto the Talon when they took it and then unloaded upon arriving on Denoo) and left. The Jedi did not pursue.