Oto Oto no Mi

The Oto Oto no Mi is a Paramecia-type Devil Fruit which allows the user to transform parts of their body into musical instruments and play music with a variety of destructive effects. It was eaten by Scratchmen Apoo.

Etymology

 * Oto (音) means "sound". It is the first kanji in the Japanese word for "music", ongaku (音楽).

Strengths and Weaknesses
By transforming their body parts into instruments (such as turning teeth into piano keys or an arm into a saxophone) and playing specific notes and tunes, the user can release music that causes damaging effects to their opponents, the type of damage being determined by what they play. There are a wide range of attacks the user can perform, from physical strikes like punches and slashes (which can dismember victims) to elemental attacks like explosions. Since the attacks come from invisible sound waves which travel at very quick speeds, it can be very difficult to recognize and dodge an attack. Even Admiral Kizaru, whose Devil Fruit power allows him to move at the speed of light, was caught off-guard by the fruit's attacks. The user can form instruments in seconds. The music has tremendous range as it can affect anyone within earshot of it, and the user is capable of specifically targeting a particular person hearing the music and applying the attacks solely on them.

The fruit's powers only work if the user's targets can actually hear the music; if they cover their ears, then the music will be harmless. Since Apoo played specific tunes for each attack, it is likely that the user must be well-versed in music knowledge and have the ability to play a large variety of instruments in all the major classes: wind, percussion, and string. The user must play multiple notes on multiple instruments in order to create the desired effect, making the power much less effective in close-quarters combat as seen when Apoo was unable to stop Eustass Kid from charging toward and attacking him in the span of a few seconds. However, Apoo can still unleash quick attacks at times, as he was able to slash Kid after being attacked. The attacks do not have any special impact on Logia users, who can easily reform their bodies after being struck. Other than that, the user is also affected by the standard Devil Fruit weaknesses.

Usage
Apoo uses the fruit's abilities in combat. Rather than directly confronting his opponents, he starts playing his music, which he calls Tatakau Music (戦う), while his target is focused on something else, allowing him to wound his target before they can react.

Techniques

 * Tatakau Music: Scratch (戦う スクラッチ): Apoo morphs his limbs into various instruments, and emits a dance-like musical number which he raps over. This move serves to set up his actual sound wave attacks. This was first seen being used against Admiral Kizaru.
 * Shan: Apoo releases a sound wave that slices his opponents. This is represented by the sound of a cymbal, which Apoo turns his jaw into. This was first seen being used against Admiral Kizaru. "Shan" is an onomatopoeia that symbolizes quick and silent sounds, like a slash. In the Viz Manga, this is called Slash.
 * Don: Apoo releases a sound wave that causes an explosion near his enemy with devastating effects. This is represented by the sound of a drum, which Apoo turns his chest into. This was first seen being used against Admiral Kizaru. "Don" is a Japanese onomatopoeia that symbolizes a strong noise, like an explosion. In the Viz Manga, this is called Boom.
 * Bon: Apoo releases a sound wave that causes the target to suffer a physical impact, akin to a direct punch. This is represented by the sound of a bass, which Apoo turns his forearm into. This was first seen being used against Monkey D. Luffy. In the Viz Manga, this is called Bop.

Trivia

 * This fruit's power seems to be an inverse of the Nagi Nagi no Mi, which can nullify all sound within a certain area.
 * Brook has also been shown using music-based attacks, though his techniques rely mainly on hypnotism in contrast to the supernatural attacking abilities of this fruit.