Gregor

"It was an honor to fight with you for something we chose to believe in."

- Gregor's final words to Rex

CC-5576-39, nicknamed "Gregor," served as a clone commando and a clone trooper captain of the Grand Army of the Republic, fighting the Clone Wars. During the Battle of Sarrish, he was forced to retreat into space. His transport ended up crash landing on Abafar. The crash caused him to suffer from amnesia and he was hired by a Sullustan named Borkus who had him work as a dishwasher in a local bar until he regained his memories after Colonel Meebur Gascon showed the commando information to him. He was thought to be killed in an explosion trying to protect the colonel and his companions in a firefight against Separatist droids, but survived, although he suffered from brain damage, causing him to partially go crazy. 15 years after the end of the Clone Wars, Gregor was still alive and was living in a modified AT-TE on Seelos with Captain Rex and Commander Wolffe.

In 1 BBY, Gregor participated during the Liberation of Lothal, where the Lothal resistance and the Spectres drove the Galactic Empire off of Lothal once and for all. During the conflict, Gregor was killed, but he didn't pass away before telling Rex that it was an honor to serve with him and to fight for a cause the clones actually chose to believe in.

The Clone Wars
"You were a captain and part of an elite squad; a clone commando. The file says you were reported missing in action during the Battle of Sarrish."

- Colonel Meebur Gascon

Gregor was in command of Foxtrot Group, an elite squad of clone commandos. After covering the retreat from his allies, Gregor was reported as missing in action after the Battle of Sarrish. However he ended up on the planet Abafar with amnesia and was given a job as a dishwasher at the Power Sliders diner by Borkus for nothing more than room and board. After Colonel Meebur Gascon and his team of droids crashed landed on Abafar, they helped him to recover his memory and he in turn helped them to escape. However, he was left alone on the planet surrounded by hostile forces and facing near-certain death. Gregor seemingly sacrificed himself after shooting containers of rhydonium to destroy the droids that would have shot down Gascon's fleeing shuttle.

Helping the Spectres
Despite his apparent death on Abafar, Gregor survived and made his way back to his clone trooper comrades. Gregor, now a Commander, survived the Clone Wars and at some point removed his control chip. In the years after the Galactic Empire's creation, Gregor was living with Captain Rex and Commander Wolffe in a modified AT-TE on the planet Seelos. Unfortunately his brain took a hit and as a result, he suffered from episodes of mild insanity.

Four years prior to the Battle of Yavin, the clones were approached by the crew of the Ghost, who were looking for information on abandoned military installations for the rebel network. When Kanan Jarrus identified them as clones, Wolffe, in turn, recognized him as a Jedi and let off a few shots. Gregor eagerly raised his rifle but Rex calmed the situation. When Ezra Bridger explained that they were sent by Ahsoka Tano, Rex welcomed them as friends. Later on, Gregor encouraged the Lasat Garazeb Orrelios to help the clones hunt for joopas. But he later reveals to Ezra that Zeb was in fact the bait, resulting in the Lasat being swallowed by the joopa, whom Gregor nicknamed Big Bongo. After managing to kill the joopa, Zeb was none to happy to learn that he was bait, but was calmed when Gregor pointed out that he helped catch Big Bongo.

While settling down for dinner, Sabine discovered that one of the clones, Wolffe, had contacted the Empire. While Gregor and Rex had grown to trust the Ghost crew, Wolffe wanted to protect his comrades from being persecuted by the Empire for harboring these rebels. When confronted, Wolffe admitted his wrongdoing and accepted Rex's reasoning that the rebels were their friends. After discovering and destroying an Imperial probe droid, the clones and rebels prepared for the impending Imperial assault. While Kanan tried to convince the clones to come with them, Rex was adamant that he and his comrades would stay behind to hold the Imperials back while the rebels escaped.

The rebels reluctantly departed on their auxiliary ship Phantom to rendezvous with the Ghost in space. Shortly later, a force of three AT-AT walkers led by the Imperial Security Bureau Agent Kallus, a perennial foe of the crew of the Ghost. While outnumbered and outgunned, Gregor and his companions faced off against the Imperials in their lone AT-TE walker. At Ezra's urging, the rebels returned to rescue the clones and succeeded in defeating the Imperial force, forcing Kallus and his men to flee into the desert. After that, Gregor and his fellow clones saluted Kanan and his Padawan, and Rex agreed to join the Rebellion whilst Gregor and Wolffe stayed behind on Seelos, taking the remaining AT-AT walker for their new home.

Helping Ezra
In 1 BBY, Gregor and Wolffe were still living in the repurposed AT-AT walker, which had been christened Joopa Base. Gregor and Wollfe's modifications included a landing platform on top of their walker. Prior to the Liberation of Lothal, Hera along with Rex and the former ISB Agent Alexsandr Kallus traveled to Seelos to convince Gregor and Wolffe to help Ezra liberate his homeworld from the Empire. Gregor and Wolffe were joined by the Weequay pirate Hondo Ohnaka, the Ugnaught Melch, and the Mandalorian bounty hunter Ketsu Onyo.

Despite the small chance of success, Gregor and the others agreed to help Ezra liberate Lothal. After traveling through the Imperial blockade, Gregor along with Rex, Wolffe, and Kallus helped the Spectres and Ryder Azadi's Lothal resistance to defeat Governor Arihnda Pryce's forces at the Lothal cliff dwelling.

Last stand on Lothal
"It was an honor to fight with you, for something we chose to believe in."

- Gregor's last words

Following the capture of Governor Pryce, Gregor along with Rex and Wolffe took part in the assault on the "Dome", the Imperial headquarters on Lothal and a mobile Imperial Planetary Occupation Facility. For the operation, the rebels traveled in two captured patrol transports. Using an unwilling Pryce, the rebels gained landing rights for the executive landing pad at the Dome. After a brief battle, the rebels managed to capture the command center and initiate a faux Protocol 13, causing the entire Imperial garrison on Lothal to evacuate aboard the Dome.

Before they could fire up the Dome's thrusters, Grand Admiral Thrawn returned aboard his Imperial Star Destroyer Chimaera and blocked their exit. Thrawn managed to force Ezra to meet him aboard the Chimaera by bombarding Lothal's Capital City. In Ezra's absence, the rebels embarked on Sabine's plan to recapture the power terminals powering up the Dome's deflector shield generator in order to protect Capital City from Imperial bombardment.

Gregor along with Zeb and Kallus were assigned to Team B, which was tasked with recapturing and restarting the south tower's power terminal. Despite fierce resistance, Team B managed to reach the south tower. There, they were attacked by Thrawn's Noghri assassin Rukh and several Death troopers. While Zeb fought Rukh, Gregor and Kallus dealt with the others. During the battle, Gregor was shot in the right side of the chest by an Imperial weapons technician. Despite being mortally wounded, Gregor hurled the Imperial into the depths of the reactor chamber. He then told Kallus to get the shields back up. After reuniting with Rex, who had helped restore the north tower's power terminal, Gregor told Rex it was an honor to serve him before passing away. The rebels went to liberate Lothal from Imperial rule at the end after the purrgil attached themselves to Thrawn's Star Destroyers and dragged them into hyperspace.

Personality and traits
As a Clone commando, Gregor was trained in combat and could operate a blaster. Despite suffering a brief spell of amnesia, Gregor was loyal to the Galactic Republic and willing to put his life on the line for it. Since Gregor removed his control chip, he was unaffected by the transmission of Order 66. Due to the brain damage he had sustained during the Clone Wars, Gregor experienced occasional periods of insanity during the Age of the Empire.

Unlike Wolffe, Gregor along with Rex were not hostile towards Kanan Jarrus and his rebel cell, the Spectres. He befriended Ezra Bridger and Garazeb Orrelios, and convinced the rebels to accompany him on a hunt for joopas in return for Rex supplying them with information on former Republic military installations. Gregor and Wolffe were loyal to Rex and looked up to him as their leader. Gregor and his fellow clones were willing to fight to the death in order to protect their new-found rebel friends from Imperial forces led by Agent Kallus. Gregor and his fellow clones came to respect Kanan and Ezra after the rebels came to their aid and drove off Kallus' forces.

While Gregor thought that Ezra's plan to liberate Lothal had a slim chance of success, his loyalty to Rex and Ezra led him to volunteer for the mission. Gregor was a competent fighter and soldier who was able to fight as part of a team. While fighting for the Rebellion, Gregor perished during the liberation of Lothal.

Behind the scenes
Gregor first appeared in "Missing in Action," an episode of the fifth season of the Star Wars: The Clone Wars television series. A preview clip featuring Gregor was later shown at Celebration VI. He is voiced by Dee Bradley Baker. A trailer for the show's fifth season includes Aurebesh on Gregor's profile notes indicating that he went missing in action during the Battle of Sarrish.

During the episode, a hologram showing Gregor's military records was displayed in Aurebesh after R2-D2 scanned his identifying code. As well as displaying Gregor's status as MIA during the Battle of Sarrish, it displayed 'Sgt 1st Class', '212 Attack Battalion' and 'Foxtrot Group', as well as Gregor's height and weight. The designation of Sgt 1st Class contradicts Colonel Gascon stating that Gregor was Captain, despite the fact that Gascon was going off of the hologram.

The markings on Gregor's helmet were inspired by the hash-marks that Boston Bruins goaltender Gerry Cheevers stenciled on his mask to denote the stitches he would have gotten had he not been wearing protective gear.

Baker later reprised his role as Gregor in the second season of the Disney XD animated television series Star Wars Rebels; appearing in the episodes "The Lost Commanders" and "Relics of the Old Republic", which premiered on October 8, 2015 at the 2015 New York Comic Con. Three years later, Baker reprised his role as Gregor once more in the final Rebels episodes "A Fool's Hope" and "Family Reunion – and Farewell", which premiered on March 5, 2018 on Disney XD.