RC-1309, also known as Niner, was a sergeant and the clone commando leader of the Galactic Republic's elite Omega Squad. He was trained by Kal Skirata and revered him. After his entire squad was killed in action at the Battle of Geonosis, he was reassigned to Omega Squad, whose members were also the sole survivor of their squads. He was previously in Lambda Squad and was a sergeant in both squads.
Nice, but you should do something to the helmet, if you don't want to mess up the helmet paint masking tape, cut it to the shape you want and place it on like a decal, and if you get bored you just take it off.