Devil fruits are special fruits that can be found all over the One Piece world. Once eaten, these fruits grant special power to their consumers. Most people who consume devil fruits are not aware of the power that they bestow, but research has been conducted to find out more about their properties.
After eating a devil fruit, that specific power stays with the person who consumed it, and it won't come back into circulation unless the person dies. One Piece has had its fair share of character deaths and some of the characters that have died were devil fruit users, which meant that their powers could finally be taken by someone else.
7 Ope Ope No Mi
The Ope Ope no Mi is a paramecia type devil, which is currently in the possession of Trafalgar Law. It has been called the "Ultimate Devil Fruit," as it allows its user to perform an immortality operation, which comes at the cost of the user's life. Doflamingo stated that if the Ope Ope no Mi is used in combination with the treasure of the Celestial Dragons, the user can take over the world.
The devil fruit can bypass Haki and cut any person or object without damaging them. It enables its user to create a "ROOM" in which they can control everything. In the Wano Country arc, Law revealed the awakening of his devil fruit, which helped him beat Big Mom. Previously, the devil fruit belonged to an unnamed doctor, and after his death, it fell into the hands of Diez Barrels. The Ope Ope no Mi was eventually stolen by Corazon and eaten by Law.
6 Mera Mera no Mi
The Mera Mera no Mi is a logia type devil fruit, and it allows its user to create and control fire. The devil fruit has a lot of attacking power, as demonstrated by its users several times. The previous user of the devil fruit, Portgas D. Ace was able to destroy a town with his "Fire Fist" attack.
Ace died in Marineford, and the devil fruit was eventually put up as a prize by Doflamingo for the winner of the tournament in the Corrida Coliseum. Sabo ended up winning the tournament, thus becoming the new owner of the Mera Mera no Mi.
5 Gura Gura no Mi
The Gura Gura no Mi is considered to have the highest destructive power of all the paramecia type devil fruits. For a long time, the devil fruit was in the possession of Whitebeard. The devil fruit allows its user to create quakes, and this ability can be lethal in a naval battle.
In theory, Whitebeard could have essentially wiped out an entire island by himself. After his death in Marineford, it was stolen by Blackbeard, who became the only person to have two devil fruits.
4 Suke Suke no Mi
The Suke Suke no Mi is a coveted devil fruit, and it was first introduced in the Thriller Bark arc. At that time, it was in the possession of Absalom. The devil fruit allowed him to turn invisible and sneak around the island without being noticed by anyone.
After the defeat of the Thriller Bark Pirates, Absalom took the alias of Absa and became a reporter. Eventually, he was captured and killed by the Blackbeard Pirates. Now, the devil fruit belongs to Shiryu.
3 Soru Soru no Mi
The Story Soru no Mi is a unique devil fruit that affects the souls of people. This paramecia type devil fruit is in the possession of Big Mom, and she gained this power from Mother Carmel, who mysteriously disappeared after the incident that took place on Elbaf.
Over time, Big Mom was able to utilize the power of the Soru Soru no Mi properly. She was able to steal the souls of other people and use them to increase her own strength. She was able to transfer the souls of living beings into inanimate objects, which made them come alive. These beings were called homies, and they were extremely loyal to Big Mom and followed her every command.
2 Bari Bari no Mi
Currently, in the possession of Bartolomeo, the Bari Bari no Mi is an extremely defensive devil fruit. It allows Bartolomeo to create barriers that protect him from all kinds of attacks. Surprisingly, the devil fruit also works against Haki-based attacks, as Seminaru managed to stop Oden's attack without any difficulty.
While he participated in the tournament that took place inside the Corrida Coliseum, Bartolomeo demonstrated both the offensive as well as the defensive side of this devil fruit. He was also able to use his barriers to push his opponents out of the playing area. In Oden's flashback, it was disclosed that prior to Bartolomeo, the devil fruit belonged to Kurozumi Semimaru.
1 Mane Mane no Mi
The Mane Mane no Mi is a paramecia type devil fruit that was introduced very early on in the series. In order to use the devil fruit, the user must touch another person with their right hand. Once contact has been made, the user can turn into an immaculate copy of the person that they touch.
The ability to copy another person is not limited to the face, but it also allows them to acquire the body and voice of the person. Presently, the devil fruit is in the possession of Bon Clay, and before him, it belonged to Kurozumi Higurashi, who used the fruit's power to make Orochi the shogun of Wano.