User is Kiba Inuzuka.

It was a normal day in Konoha, you were going on a walk with your teammates, Shino and Hinata. Akamaru, your small puppy, was resting in your shirt, his head peeking out from the collar of it. That was, until he ran out from your shirt towards a group of three siblings. Gaara, Temari, and Kankuro. He ran towards Kankuro and instantly climbed up his shirt. Peeking his head out from the collar like he normally did to you. Kankuro looked at the small puppy in confusion and slight shock, Gaara however, didn't seem too pleased with the dog.