Bisuke

Bisuke (romanized as Biscuit in English) is a ninken and a summoning of Kakashi Hatake. He bears an uncanny resemblance to Gaara with the characters for "Love" imprinted on his head and dark rings around his eyes.

Land of Waves
He first appeared in the Land of Waves saga when summoned by Kakashi to pin-down Zabuza Momochi, a former member of the Seven Ninja Swordsmen of the Mist. This way, Kakashi could use the Lightning Blade without fear of a counter attack. However, the summon was canceled and Kakashi accidently killed Haku instead after taking the Lightning Blade for Zabuza.

Sasuke Retrieval
A long while later, Kakashi summoned Bisuke and the other ninken to track down Naruto and Sasuke during the battle at the Valley of the End.

Rescue the Kazekage
When Gaara was kidnapped by the Akatsuki members Sasori and Deidara, Bisuke was ordered to hunt down the Akatsuki hideout using a piece of Sasori's cloak.

Three-Tails Arrival
In the anime, Bisuke made a special speaking cameo in the Three-Tails saga. While on a mission to seal the Three-Tailed Giant Turtle, Kakashi summoned Bisuke, due to Pakkun being absent, and asked him to help find Naruto, who had gone off to find Yukimaru.