The Uchiha Clan Produced a Pirate King

When Uchiha Sasuke Meets Fire Fist Ace: Help, I Think My Sister Dragged the Naruto Cast onto the One Piece Set!

Ayane, the daughter of the Pirate King, transmigrates to the ninja world, awakens the Sharingan, and becomes Uchiha D. Ayane.

Aya, Ace's twin sister, cries so hard she nearly burns herself to death before getting bound to an unreliable System. Want to save your brother? Go to Naruto, join the Uchiha, and collect "Bond Points" to exchange for a resurrection ticket!

And so, Konoha gains an Uchiha with a very unusual style: she uses Fire Style: Fireball Jutsu to grill meat, tells Itachi, "That move of yours isn't as cool as my brother's Fire Fist," and pins Sasuke to the ground before adding, "Be a good boy. Big Sis will take you to meet the real 'Flame Emperor.'"

As she keeps collecting points, she looks at the people around her, their Sharingan eyes practically bulging, and falls into deep thought: She has enough Bond Points, but... who should she take back with her?

Later, a rift suddenly opens over the battlefield at Marineford.

Itachi lands with Amaterasu blazing, his expression blank as he burns through Marine Headquarters. "Ayane said anyone who gets in the way of her saving her brother has to die."

Sasuke crushes a shuriken in his hand. "Did that guy called Akainu just hit my sister?"

Even Kakashi, passing by, adjusts his headband. "I don't really understand, but... copying Fire Fist could be useful, right?"

Aya: Wait! The System only said I could take people with me. It never said this would start a world war between ninjas and the Marines!

Ace (revived and utterly bewildered): Sis, who are all these people behind you with masks, Sharingan, and pineapple heads... new crewmates?

Fists against Madara, feet on Hashirama??

Uchiha Ayane: I'm going to be the Pirate King's woman.

Everyone else: No, you're going to be Hokage.

The Uchiha clan...

Theme: Everyone has the chance to change their fate