Rex: On one, launch the shuttle. three....two....
Rex: I didn't say "one" now did I?
Denal: I didn't Request it sir.
Denal is Rex's second in command Clone Trooper. He carries out orders from Rex and other High ranking Officers. Just like Rex, he doesn't fight on the Battle field, but he helps Rex operations from the War room away from the battle field.
Even though he hasn't been on the field for awhile, he still holds strong skills with his Blaster rifle.