Crimson Viper

C. Viper
Street Fighter character
C. Viper in Ultimate Marvel vs. Capcom 3 (2011)
First game	Street Fighter IV (2008)
Voiced by (English)	Michelle Ruff (Street Fighter IV, Marvel vs Capcom 3, Street Fighter V)
Voiced by (Japanese)	Mie Sonozaki (Street Fighter IV, Marvel vs Capcom 3, Street Fighter V) Kaori Asoh (Japanese dub of Street Fighter: The Legend of Chun-Li)
Portrayed by	Moon Bloodgood (Street Fighter: The Legend of Chun-Li)
Fictional profile
Birthplace	United States
Nationality	American
Fighting style	Secret Spy Gadgets from Battle Suit
Occupation	CIA Agent

Crimson Viper (クリムゾン・ヴァイパー, Kurimuzon Vu~aipā^?), also known as simply C. Viper, or Maya (マヤ) is a fictional character in the Street Fighter series. She made her first appearance in 2008's Street Fighter IV. In the series, she is a CIA agent working undercover for S.I.N to acquire data for the BLECE Project while using a special battle suit fitted with gadgets.

Crimson Viper made her debut appearance in the 2008 Street Fighter IV as an American double agent posing as a S.I.N. worker but actually a CIA agent undercover. She wears a S.I.N form-fitting suit which enables her to perform electrical, seismic, and pyrotechnic moves. Her fighting style greatly revolves around baiting, fakes, high jump cancels, and rushdown. Because of this, she has one of the steepest learning curves in the game. It is said she is motivated by her daughter Lauren, as well as money. In Street Fighter V, Viper appears in M. Bison's story mode and serves as the main narrator of events while spying on the dictator.

Crimson Viper also appears as a playable character in the crossover fighting games Marvel vs. Capcom 3: Fate of Two Worlds and Ultimate Marvel vs. Capcom 3. She is also a boss character in Street Fighter X Mega Man. In Street Fighter: The Legend of Chun-Li, Maya is played by Moon Bloodgood.

While previous Street Fighter titles relied almost solely on Capcom's Research and Development branch, the development team instead allowed other branches of the company to give input on the design of new characters, due to the influx of fan requests from outside Japan. Viper was designed based upon marketing research on what sorts of characters an American audience would enjoy playing, and tailored her towards Western tastes as an experiment to see how audiences would receive the character.Street Fighter IV executive has described her as the most "unorthodox" of the four new characters introduced in the title, emphasizing this aspect as one he felt would appeal to American players, and was his favorite character when the game was early in development. In response to claims that the character resembled one found more commonly in SNK developed games, Ono retorted that the resemblance was unintended, and that she was created from the best parts of several proposed designs during early development. He went on to state that she was also an attempt to create a character with a "cool" design, which he feels are predominant in SNK titles.