Ningyo Ningyo no Mi

The Ningyo Ningyo no Mi is a Paramecia class Devil Fruit that transforms the user into a Puppet Man. It was eaten by the Cook of the Black Heart Pirates, Izanagi.

Appearance
The fruit was originally an oddly shaped orange apple that is elongated vertically with purple dots coating it.

Strengths And Weaknesses
The fruit turns the user into a living puppet. The user can now take their body apart and change it with another, and enhance their bodies in several ways by adding hidden mechanisms. After consumption the user is no longer harmed by bullets even if they go through them. Only if they're hit in their "heart" can they be harmed or killed.

The user of the devil fruit gives up many of their human characteristics such as taste, smell, and even touch. They don't feel anymore making it difficult to tell if they're hurt. Other weaknesses include that their artificial heart is out in the open and easily exposed if the opponent knows what it is they can exploit it. Other than that, the user suffers from standard devil fruit weaknesses.

Usage
Izanagi uses the devil fruit for battle. Since he can no longer tire out he becomes a major factor in the battle. Since he can't feel pain he can run into any battle without taking much damage.