RC-7770 "Irish"

RC-7770 was the Sergeant of Echo Squad for most of the clone wars. He was an elite clone commando. He was led by an unnamed commando during The First Battle of Geonosis but he was killed while supporting Delta Squad. Irish got his name due to Irish in the clone war being slang for Lucky and he had it since he was grouped with Echo Squad.

On the Battle of Geonosis Irish tried to his former Sergeant to cover and medic help but a few minutes later he died due to his wounds. Irish pulled his squad through and they survived due to his leadership. Once they left Echo Squad got a new commando and Irish was promoted to Sergeant.

He led Operation Felucian Moonlight which was to recuse Alpha-99 "Naastar" and other 505th Attack Battalion members who crashed on there and was ambushed by CIS forces. The operation was a success and Naastar was saved.

Due to this they went on more dangerous operations similar to Delta Squad's and Omega's operations. Another Operation was Geonosian Tombstone where they and and few other commando unit's had to survive weeks without food and sleep just to kill high ranking droid and a jedi traitor and it was a success as well. Irish led the main attack on the jedi traitor strategically giving positions and gave the orders and what to do to survive the use of the force and lightsabers. In the end Echo Squad keep his head,

When Irish found out of Order 66 he was in shock but only keeped it to himself to just check if it was a false alarm. When it happened Irish fled to Yavin IV and found an anti-aging process like most ARCs and commandos wanted. Before he used it he was cryogenically frozen by the empire and was put on the super star destroyer that crashed on Jakku and few few years after the Battle of Jakku he was awoken and found a way to destroy the clone aging process so he can fight for the New Republic. Now he is a commando leading a New Republic Commando Unit.