I'm all for unblemished, unrealistically clean female characters. When the setting calls for it. Xenosaga is my usual go-to example: Only one female character is actually 100% human. She is NOT the one who looks badass, and in fact in most art looks nervous (or pin-up). Storyline-wise she bemoans the fact she isn't as easy to clean as the robotic party members, her cleanliness is a minor plot point. The Badass belongs to the psychopathic babyfaced Terminator-wannabe robot... It ALSO never does the camera-smug, because part of its badass nature is the fact it's a Terminator-wannabe, it showcases the badass through actions, not through dreamworks-tier smugging.

A street walker (no euphemisms, literally, "one who walks the streets") of some major city, who does dirty deeds, should for narrative sake have some dirt upon them unless it's a plot point otherwise. You don't need to be obese and hulking, but your expression should match what the character is trying to portray, and appearance is part of expression. If this is a street surgeon or something that needs to keep clean, could make sense, but you'd go for a different hairstyle then, either something even shorter, or something long that can be tied up. And the facial expression would be odd, then, but I suppose could exist in some contexts, like an "I told you so" to an injured protagonist.

Saint's Row The Third has five people on the cover art. All but one are looking away from the camera, distracted by something to the right. One side character is smugging the camera, and looks like a joke because of it, like they missed a cue. The one woman on the cover isn't smugging, but rather looks disgusted by something near her feet. The man beside her looks disappointed by whatever is at her feet, while a third is observing it dismissively, gun out. It tells a story in one frame.