Bill Rizer

PFC Bill Rizer (ビル・ライザー, Biru Raizā?), code name: Mad Dog, is one of the two main protagonists of the Contra series, along with fellow commando and brother-in-arms, Lance Bean. He was one of the most renowned members of the "Contra" task force, an elite group of soldiers specializing in guerrilla warfare, and one of the greatest soldiers that ever lived.

Both combatants alone were able to repel numerous invasion attempts on Earth by extraterrestrial forces –mainly carried on by the evil Red Falcon army– and were known as heroes worldwide after successfully defeating them completely during the Alien Wars.

A series of events eventually made them go their separate ways and at one point even put them fighting against each other.

As part of a well-planned conspiracy, he was framed by the Government's people in power and considered a war criminal. He was sentenced to serve time in cryostasis, although he was called upon to fight once again on a couple of conflicts that arose during that time.

Unbeknownst to him, clones of him were produced, most likely while he was serving time in cryogenic prison.