Question: What is Miho's backstory?
Answer: Not much is given on Miho's story in the graphic novel. Some is given in the story "A Dame to Kill For" where Dwight explains he saved her life once. Frank Miller in the extended cut DVD commentary stated she was a demon, but that is never mentioned in the story.
Question: With all the green-screen and compositing, which of the (major) actors actually got to work with each other? (Ex. it seems like Jessica Alba & Nick Stahl was together for some scenes, but Mickey Rourke never worked with Elijah Wood).
Answer: If you get the this version of Sin City, on the special features you can watch the whole movie speeded up to 15 mins, in its green screen version. http://www.amazon.com/Sin-City-Unrated-Two-Disc-Collectors/dp/B000BCKFWK. That will show you which actors were actually together and which were just composited in later.
Question: What is the story about Miho's victory-cross-shaped shuriken? Any relation to her later shooting the likewise-shaped tattoo out of the head of a henchman?
Answer: Miho's shuriken is an actual Japanese weapon, whereas the symbol on the henchman's head is a swastika. There is no relation between the two.
Question: So did "The Man"(Josh Hartnett) Kill Becky at the end? If so, is she the one that hired him to do it, just like the other girl that did?
Answer: I think we can safely assume that "The Man" kills Becky in the elevator, yes. But unlike the first woman, Becky had done something to piss off a lot of people (basically betraying all the girls working in Old Town), and they sent him to eliminate her.
Question: How did Kevin kill Goldie without leaving a mark on her?
Answer: Seeing how quiet and skilled at killing Kevin is, it is not unlikely that he managed to creep up and, while clamping a hand over her mouth, inserted a syringe with a fast-working poison. Another, more cinematic, possibility is that he used his martial arts skills to strike certain pressure points with his fingertips, killing her instantly.
Question: During the section toward the end where Bruce Willis is arriving at the farm to rescue Nancy, we see Elijah Wood sitting and reading the bible in the house. Since he is a friend of the yellow freak's family, why doesn't he do anything to stop Bruce Willis? He certainly helped when Mickey Rourke was around but this time he just sits and does nothing and I'm a little confused as to why. If someone could help me I would really appreciate it.
Answer: Elijah Wood's character is shown in the house, distracted as Bruce Willis sneaks by. Perhaps he doesn't do anything because he doesn't know what's going on.
Question: Is the car that Dwight and nearly-headless Jackie-Boy have their conversation in (the scene that Tarantino directed) the same type of car in Reservoir Dogs & Pulp Fiction?
Answer: It's the same as the one in Resevoir Dogs, but I dont know about the one in Pulp Fiction.
Question: Who was the man that was with the woman in the red dress, and why did he kill her?
Answer: Josh Hartnett is known as 'The Man' and is a professional hitman. He killed the woman in the red dress because she hired him to do so, which is why he said 'I won't know what she's running from' and 'I'll cash her check in the morning.'
Question: Jack and Marv were both innocent men who were falsely accused of crimes they didn't commit. Since they both know this why in the world did they both sign false confessions claiming they were the ones who broke the law?
Answer: Marv signed the confession since they threatened to kill someone close to him. Jack confessed so he can get out of jail quicker.