It's actually pretty hard to choose, the ladies in Kill Bill all have the whole 'play me and I'll cut your balls off' vibe going on, which is awesome. I would say Elle, but she crosses the line between sexy and downright scary too often, so it's gotta be O-Ren.
Her monlogue when she's standing on the table after slicing Boss Tenaka's head off is excellent. Powerful and sexy baby 😎