RC-1138 "Boss"

Three-Eight had the voice of Jango Fett, indicating that of all the Delta Force clones, The Boss inherited more of his progenitor's traits than his squadmates. He was a very tenacious and seasoned clone, and among his subordinates, he was also the toughest, aside from Sev. RK-1138 excelled as a team leader, quickly analyzing information, making decisions, and issuing orders. He wielded great authority among his subordinates. When The Boss advanced toward his goal, nothing and no one could stand in his way. However, he was also not without human feelings—the commando always thought of his brothers in battle.
The Delta Force leader was also a connoisseur of all weapons. As Kal Skirata once remarked, the Boss "has a weakness for pretty toys." This was indeed true: the commando loved unconventional weapons, often preferring non-Republic weaponry if it proved more useful than the DC-17m. His armor is covered in orange stripes, and his chest plate features four small circles of the same color.

He fears only his teacher, Walon Vau.