Crimson Viper is an American fighter employed by S.I.N., and presumed head of the "Battle Suit" Project. In reality, Crimson Viper is a secret agent under the employ of a U.S. government agency, presumably the CIA. She enters and participates in the latest world tournament under the guise of acquiring data for the Battle Suit for S.I.N., though her true motives are to acquire data from the BLECE Project (Pronounced Blees), in addition to eliminating "Number 15".
Crimson Viper wears a specially designed Battle Suit for the tournament, developed and manufactured by S.I.N.. When inquired by an Executive as to the reason for her participation in the tournament, she states that she's the only test subject to utilize 100% of the suit's capabilities effectively, and thus is the prime candidate for the field test. The suit is remarkable in the sense that it resembles an ordinary business suit, though two weapons lurk within the accompanying gloves and boots.
The gloves have metal knuckles that can be electrically charged, creating visual arcs of electricity when enough power is supplied; these can stun or damage an opponent quite heavily at higher settings, which combined with Viper's natural speed and agility pose an incredible danger to fighters of all skill and size. The boots hold jets inside the arc between the heel and sole, with a switch on the side of the boot activating the temporary jet propulsion. The boots are capable of granting the wearer a much greater jumping ability, though Viper frequently fires them up and uses them in a defensive kick, burning anyone within distance.
The suit does not provide the wearer with any sort of ranged attacks or abilities in the traditional sense as opposed to ki practitioners who utilize attacks such as the Hadoken or the Sonic Boom, but the gloves (when switched to a particular setting) allow for C.Viper to unleash the "Seismic Hammer," a ground explosion from beneath her opponent that she causes by punching the ground with the glove. This is a very deceptive attack, considering it travels beneath the floor. The Battle Suit does not (presumably) protect the wearer from damage; it was designed for stealth and ease of concealment, not battlefields or war zones.