My Sister from One Piece Has the Qualifications of the Four Emperors

[Transformation + Low System + Growth] Due to a car accident, Aqua was assigned to the world of pirates. Not only did she become a girl, she was also the younger sister of the famous Roronoa Zoro. What's even more shocking is that a mysterious "card pool system" was bound to me. However, the system's explosion rate is hopelessly low. Just when I almost gave up, a golden light cut through my despair - I won the [Two-day First Class] inheritance of the swordsman Miyamoto Musashi in the world of "Fate"! The memory of the past life and the obsession of this life converge at this moment. I resolutely followed my brother's footsteps and boarded the straw hat boat that was destined to overturn the world. The days of fighting side by side with Luffy and Zoro were exciting, but I knew that this vast ocean was still waiting for my own legend. So, in the middle of the voyage, I made a bold decision: bid farewell to the Straw Hats and start my own business! I will use the two swords in my hands to gather like-minded partners to establish my own beautiful pirate group. As a woman, I will launch the strongest challenge to the four emperors who are entrenched at the top of the new world! The world's number one female swordsman? That's just the starting point. My ultimate goal is to become the only one on this ocean - the Empress!