Dynami

Dynami is a body guard for the mafia pirates and professional bodybuilder

Devil Fruit
Dynami will passively adapt to his surroundings or whatever scenario he is in over time. For instance if he is stuck in a place that is extremely cold after a couple seconds he will begin to adapt to the cold and within a couple minutes can be completely immune to the cold. Same with things like heat, fire, extreme pressure, ect.

While his ability seems unbeatable it has several glaring weaknesses. His fruit will put his body through thousands of years of evolution in only a couple minutes just so he can deal with his specific scenario. So if his body adapted to the intense cold he will be unable to go into a place of high heat without major precautions. The changes to his body are not permanent so if he is taken away from the place of extreme cold his body will slowly return to normal.

The fruit can also cause changes in Dynami's physical appearance if it is required for him to continue to survive in a specific place.