Continuity mistake: When Nancy is dancing, she is alternately wearing/not wearing gloves between shots.
Continuity mistake: When Lucille throws the pills to Marv, he catches it with his left hand (while holding a cigarette in his right hand). The shot changes immediately to a close up on the pills in Marv's right hand. Then in the next shot Marv takes the pills, but has to take the cigarette out of his mouth first.
Continuity mistake: The blood on Marv's chin appears and disappears when he's being interrogated by Wendy and the girls.
Continuity mistake: In the scene where Michael Clarke Duncan has Rosario Dawson tied to the chair, in one shot her left earring is tied next to her neck with the rope holding her to the chair, but in the next shot, the earring is hanging free. The shape of the earring prevents it from simply being pulled from the rope because of how rigid it is.
Continuity mistake: Rosario Dawson's earrings are the pierced kind when she's tied to the chair by the mob. After they exchange her for the cop's head, the earrings are clip-ons.
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.
MasterOfAll