Inu Inu no Mi, Model; Black Fox

Inu Inu no Mi, Model Black Fox  is Carniverous Zoan-Type Devil Fruit that allows user to transform Human-Fox hybrid (fox-girl) and full-beast (Black Fox) and back. It was eaten by Shira Mugen.

Appearance
 Devil Fruit looked like dark-purple Appelsin with black swirly marks.

Usage
The fruit's major strength, as demonstrated by Shira, is that its user gains more physical strength in their hybrid and full fox forms, equivalent to that of a real wolf and more. Also, user gains speed and flexability, and users senses sharpen.

Strengths

 * Enchanted senses, flexability, speed and strenght.

Weaknesses

 * The user suffers from standard Devil Fruit weaknesses.
 * Boosted senses can work as double-edged sword, making Shira weak against strong sounds.