The Nine-Tailed Pirate: Luffy's Twin Sister Sails the Grand Line
When Monkey D. Luffy's twin sister devours a Mythical Zoan Devil Fruit granting her the powers of a nine-tailed fox, she joins the Straw Hat crew as their most unpredictable weapon—a trickster goddess who can seduce admirals, unleash devastating illusions, and transform into a beast that rivals the Yonko themselves.
You may also like

Grand Line University - One piece college au
Blu.
This is a fusion of One Piece canon with a vibrant modern-fantasy college AU set at Grand Line University (GLU). The Straw Hat Pirates, Heart Pirates, Whitebeard remnants, Supernovas, and other factions exist as students (with some canon characters in faculty or mentor roles). Devil Fruits and Haki are rare but real abilities that influence campus life, training, parties, and rivalries.
![The Crimson Smile. [YOU X LUFFY]](https://images.getfreeroam.com/cdn-cgi/image/width=400,height=256,quality=80,format=auto,fit=cover,anim=false/covers/166473/ba135503dc19450abb71b7b34903842a.png)
The Crimson Smile. [YOU X LUFFY]
loxamoon
In the world of One Piece, a red haired woman with Conqueror's Haki hunts for her past, and the one person she refuses to lose again.

Shanks’s twin
MariaPerez
You and your brother are twins and your father is shanks, and all you both inherit from him is Haki and the red hair, you have Observation Haki your bother has Conqueror's Haki but because you both are shanks’s child you both have obscene versions of it. But you both have Armament Haki. You represent Shanks’s serious side while your brother represents Shanks’s playful side. By the way, you both don’t know Shanks is your father and people who seen Shanks can tell you have some connection to him but people who knows Shanks can tell you and your bother are his kids like Mihawk,His brother and his crew. But to people who doesn’t know Shanks doesn’t know your his kids. And you and your brother are 20 years old.
![Embers of the Moby Dick. [YOU X ACE]](https://images.getfreeroam.com/cdn-cgi/image/width=400,height=256,quality=80,format=auto,fit=cover,anim=false/covers/166473/17af837d349142b9a8c90aa033943c7a.png)
Embers of the Moby Dick. [YOU X ACE]
loxamoon
Whitebeard’s fiercely independent daughter returns from a two-year solo voyage to carve her own legend, only to find her unshakable composure tested by a fiery new crewmate named Portgas D. Ace.

Straw Hats & Bad Habits | One Piece College AU
Blu.
One house party is all it takes to get tangled up in Monkey D. Luffy's notoriously chaotic college friend group. What starts as a casual introduction quickly turns into late-night parties, spontaneous adventures, messy friendships, unexpected romances, and drama that never seems to end. Everyone has their own secrets, complicated histories, and questionable habits, and being the newest face in a circle where everyone knows everyone means there's never a dull moment. Between classes, hookups, rivalries, and nights nobody remembers quite the same way, university life is anything but ordinary.

Grand Line Uni One Piece College AU
Jules
You are the new transfer student at Grand Line State University. Find romance, create friendships and try not to be a pawn between the president's of the two biggest fraternities.

DEAD MAN'S CURSE : JJK ZOMBIE AU
Visperia
When the dead stopped fearing curses, the living started fearing each other. It has been eleven months since the Collapse and now you are forced to survive in the new world that is filled with the unliving. Make connections, gather materials, survive.

The Swordsman’s Claim
Ditto
After a scatterbrained warrior is captured by the Straw Hats, she joins their crew—only to discover Zoro has already decided she’s his wife and refuses to take no for an answer.

Everybody Here Wants You
darwin
You are the one person that everyone wants, but no one can have, except…

Rose of the Monkey Clan
PortgasDTaylor
When Garp visits his grandsons with iron fists and tough love, the boys discover his one glaring weakness: his shy granddaughter Rose, whose quiet presence shields them from his wrath—until she sets sail with Luffy and the old marine faces an impossible choice between duty and doting.