Maki Isamu

Yaiba Yaiba no Mi is a Paramecia type devil fruit that give the user the ability to turn his arms into a special metal blade that so far has never been revealed what kind of metal is made, this fruit has gone through three generations of Uedas a Royal clan of the Majin tribe. Haruto Ueda was the first to find it and Katsu Ueda is the actual owner of the Devil Fruit.

Appearance
The fruit was never seen, only mentioned and the powers which it gives. Listen some clues of how the fruit may be, it is likely that the fruit is an Apple and color can be either red or black.

Strengths and Weaknesses
Throughout history the fruit was showing several different powers that varied according to the consumer, and as such the weaknesses also changed each one of them had a single weakness that others had not. The first consumer of fruit Haruto, proved to be able to change the blade so that it gets longer and with more spaces being divided into several parties looking a lot like a whip and also get to make both his arms in blades more resistant than any of the other users.

Akira the second user of the fruit was of the three that had less control over the fruto and eventually die due to slides they used his own life to kill the others, he lost consciousness and more than half of his body was transformed into slides and eventually die. Katsu the captain of the Pirates of the black hair and current user of the fruit of the devil, he of the three users is the most powerful and has more control and able to create various ways gaining even more power, he manages to transform just his fingers, a whole arm and both arms to choose from.

Haruto had a weakness when using the fruit as Akira or Katsu had to use it it was the fact that as he grew old his guns were getting weaker and the longer he uses-if he was getting older. The only weakness of Akira was the fact that the fruit would gradually taking life and control over his body to the point that he ends up getting killed. Katsu had all the weaknesses the most dangerous and difficult to combat, if he wanted to use the can all the fruit he had to fight against a life form created by the fruit and win. For the fruit to keep calm and controlled Katsu made a deal with him that if Katsu to be weaker or quit-if anything the fruit and he had to fight and if the fruit was lost control Katsu of the body and could do what he wanted.