Game: Metal Gear Solid 2: Sons of Liberty (2001)

Sure, he's not as cool as Solid Snake. But the slightly effeminate Raiden eventually becomes a force to be reckoned with, particularly in the most recent Metal Gear Rising: Revengeance. In his first appearance, Raiden is a rookie member of the FOXHOUND squad, but it's eventually revealed that he was also a feared child soldier.