Would this trope still be in effect if the character in question is decidedly a Fragile Speedster who Minored In Asskicking, but wouldn't necessarily stand a good chance against someone much stronger than themselves? Or would it count as a subversion?

Given that it is said that "A character dependent on Waif-Fu is likely to be a Fragile Speedster, or possibly the Jack of All Stats. Sometimes Super Strength is added on, but it doesn't make a lot of sense then"; it makes no sense that you're using this particular example of Sin City, since in it the character of Miho is "strong enough to leap off a rooftop and shove swords through a car roof" and able to survive "a grenade going off under her feet without a scratch".

I was going to add as an example Kevin, the character of the first SC book (played by Elijah Wood in the film), since he CLEARLY is faster and more agile than the hero, but Marvin is stronger. In fact, he defeats the bad guy PRECISELY by getting him "captured or pinned" so he's not "able to break free", and he depends on "cool moves to win rather than simple strength". Really, this example fits very well with what the trope is saying (the texts between quot. marks are taken directly from the trope), as opposed to the example given.

(All this for the "Comics" section, of course)

So I think that the current example (Miho) should be actually erased (because it does NOT represent the trope accurately) and replaced with this one. But being a new guy, I am still kinda shy at erasing something, and I don't want to add an example that opposes the already given one. So if someone more experienced thinks I am correct here (I don't have doubts about it, I am just new), please, erase it and add something like:

Sin City: Kevin, the mute cannibal in the first story ("The Hard Goodbye"), is faster and more agile than Marvin, the muscled hero. He actually has to handcuff Kevin to himself, then he easily knocks him out.

Thanks.

At the part that talks about Penelo being a Waif-fu, I think it'd be a good idea to use a quote from the original game. I believe the quote was a conversation between Basch and Penelo when they were at the Ogir-Yensa Sandsea.

"If you grow tired, we stop and take rest."

"You don't have to worry about me. I'm tougher than I look."

"You are at that."