Jara Jara no Mi

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The Jara Jara no Mi is a Paramecia-type Devil Fruit that allows the user to grow chains from their body, making them a Chain Human (鎖人間). It was eaten by Mad Treasure.

Etymology
"Jara Jara" is a Japanese onomatopoeia for the jangling of metal, such as chains.

Usage
Treasure has been shown to wear his chains as accessories like necklaces and sashes.