Boss

"Boss" was the nickname of an elite clone commando who was part of Delta Squad during S6, the fruit of many years of research as the perfect warriors under Delta that even the Three King's are trying to replicate, serving with commandos Fixer, Sev, and Scorch.

Boss
He is an adventurer and a swordsman who has a knack for arriving at the right place at the wrong time.

Episode 13
Takes Tatsuya's place in the fight against The Circus with the rest of his squad to protect him under Delta's orders.