Advanced Recon Commandos—ARC troopers—were an elite variant of clone trooper in the Grand Army of the Republic. Although very rare on a galactic scale, they were among the most skilled soldiers in the galaxy. Early in the clone army's planning and development, Mandalorian advisors advocated the creation of special clones capable of handling missions too delicate for the standard units. For these, the Kaminoans didn’t apply the standard behavior correction and enhanced the prime clone's genetic sample to increase physical prowess, creating 100 ARC troopers, designated the Alpha-class.
After standard flash training and accelerated growth, they were under direct tutelage of Jango Fett, where they learned to use their independence, creativity, and physical superiority in combination with training in advanced weapons systems to become virtual one-man armies. The ARC troopers were then locked in stasis on Kamino until they were required, eventually being integrated into parts of the GAR. As the ARCs took their place in the larger world, they developed distinct personalities due to their unaltered nature; some gave themselves names, and others formed relationships outside the GAR.
As the Clone Wars progressed, some battles were won largely thanks to the ARC troopers; and as their reputation spread throughout the galaxy, the ARCs proved time and time again why they were regarded as the best of the best in the GAR. However, because of their independent nature, they were more prone to questioning orders. It also eventually became evident, though aged to adulthood through accelerated growth, the Alpha-class ARC troopers were aging normally, not at the advanced rate of the other clones.
Due to their individualistic nature and the imperial hostility toward it, most ARCs deserted during the final days of the Clone Wars, even refusing Order 66 as it was not genetically programmed into them. Many went rogue, following in Jango Fett's footsteps by becoming bounty hunters and assassins. Some ARCs later joined the Alliance to Restore the Republic, and some adopted the Mandalorian culture of Fett. Those few who remained in Imperial service were able to help in the training of stormtroopers, passing on their combat experience. Most of those ARC troopers became the Imperial Commando Special Unit, a special forces unit attached to the elite 501st Legion. Ayarci Phortitu, called “Yarcy” by his compatriots, was once ARC-42, one of those ARCs who refused Order 66, went rogue, and became a bounty hunter. He repainted his armor to maintain a low profile, and sticks to the outer rim to avoid Imperial eyes. This is for a Star Wars Rebellion era RPG. Remember, it's Yarcy
Phortitu, totally not the MIA and presumed dead elite clone trooper ARC-42. Totally not. Stop asking. Move along.
Full disclosure on the artwork the original pencils are from the super-talented JediKnight97 , from his piece . Used with permission. Go check out his stuff!