Shank

Story related, can not be missed if you finish the game.

Boss Tips:

She's really easy actually. I'd suggest using the duel machetes against her. Just keep attacking with combos involving both & and stay on top of her. Once you knock her down, just go back to attacking again as usually her first attack after she gets up will miss you than and you can go right back into comboing her again. Occasionally you'll see a button flash above her head and if you can hit it at the right moment when she's about to hit you, you'll do a very heavy damage attack to her. Just keep attacking and she will fall quickly.