Akino

Akino (アキノ, Akino) is a ninken and a personal summon of Kakashi Hatake.
He has tan fur with one white strip starting from the top of his head and going down his muzzle. He wears sunglasses and the standard outfit of Kakashi's ninken, consisting of a blue vest with the heno-heno-moheji seal and a Konoha forehead protector around his neck.
Akino is among the ninken that has demonstrated the ability to speak. He also has heightened senses with which he can use to track his target with ease. He has also demonstrated the ability to track his target underground through the use of the Summoning: Earth Release: Tracking Fang Technique as well as hold a target down, allowing Kakashi to attack them freely. He also along with exceptional teamwork with the rest of his pack, able to develop and effectively use several offensive and defensive formations in battle which make use of the manoeuvrability and powerful limbs.
Kakashi called on Akino and the ninken pack to track and capture the missing-nin Zabuza Momochi. They managed to bite onto the missing-nin and pin him in place. This allowed Kakashi to use Lightning Cutter without fear of a counter attack.
Later, Akino and his fellow ninken were summoned by Kakashi to track down Naruto Uzumaki and his team who had gone off in pursuit of Sasuke Uchiha.
He along with the other ninken were summoned by Kakashi to investigate the Takumi Village.
Akino and the ninken pack were called upon to track down the Akatsuki member Sasori, using a small piece of his clothing.
Some weeks later, Kakashi summoned the pack to help track down Itachi Uchiha. He and Guruko partnered with Shino.
In the anime, Akino was seen along with Urushi, Shiba, Bisuke and Ūhei being deployed by Kakashi each carrying scrolls with intel for the other hidden villages.