BIO: The Demolition-Man of Commando-Unit Delta, he is known have the biggest mouth in the Unit, with a Upgraded U.N.S.C Gernade Launcher. Seenking for thrill and excitement;  He joins a small insurrection group with his brother Leon until they were ambushed by a U.N.S.C Strike-team. Grayson and his brother were the only survivors of the group. They were then sentence to fourty years in prison. Three years have passed since prisonment, having a borning time, the prison was attack by another insurrection group. druing the fight They met David and decided to hold the Prison until U.N.S.C reinforcements arrived. With their sucess, they were granted a full pardon and was selected into the "T.A.N.C" Program (Said like Tank). Now he is Delta-Three, or known as Tank. (Major Character)