Inu Inu no Mi, Model: Wolf in One Piece

As the fruit hasn't yet been shown in the anime, we don't know a lot about its appearance.

The major strength of this fruit is that it's user can become a wolf hybrid aka a werewolf and a whole wolf and they gain immense physical strength in these forms. These physical strengths are also lethal and they also have claws and fangs which they also use to attack. As they are carnivores, they're more ferocious than other Zoan-types.

This devil fruit doesn't have its own weaknesses other than the standard one which is the inability to swim.

Jabra uses his devil fruit powers for combat purposes along with Rokushiki and Tekkai Kenpo. This helps him become a more lethal fighter. When he uses them together with his underhand tactics he can make the opponent drop their guard down and give him an advantage.

Whenever he is not fighting, he uses his devil fruit powers to commit assassinations. He also used his hybrid and full form for entertaining people to raise funds for Lucci's medical bills.

The techniques used by Jabra are:

Jusshigan

In this technique, Jabra puts both of his hands together and performs the Shigan with all ten of his fingers which damage his enemy.

Tekkai Kenpo

In this technique, Jabra uses various Kung fu techniques while fighting his enemies. It is a whole style of fighting.

Rankyaku "Koro"

In this technique, Jabra uses Rankyaku to skip around the ground and he bounces in curves towards his enemies.

Rankyaku "Lupus Fall"

In this technique, Jabra shoots four Rankyaku projectiles in the form of wolves straight towards his enemies. These explode upon contact with the enemy.

Q. What does Inu mean?

A. Inu in Japanese means ‘dog’.

Q. Who ate the Inu Inu no Mi, Model: Wolf?

A. Jabra is the person who ate the Inu Inu no Mi, Model: Wolf.