Have you ever played the Street Fighter game and seen the character in context? She doesn't have an huge muscular or super buff upper body because her attacks and proficiencies are specialize to her legs. Even though she can deliver powerful punches, most of her attacks are centered immensely powerful and devestating kicks and jumps.
The character depicts her as she appears in the Street Fighter II, III, Alpha, Turbo and vs Marvel games. She is more muscular all over in IV.
The Street Fighter characters also have super-sized hands. They stick out more in IV.
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