Name: Chako
Japanese name: チャコ
Sex: Female
Breed: Akita/Kishu mix

Chako is a pet dog whose owner saves Sasuke from dying. When she returns home, she talks to her half-sister Koyuki about Sasuke and both of them decides to go out and search for him. They find Weed and Koyuki's brother Kotetsu in a battle with some bigger dogs.

Chako falls in love with Sasuke and his pretention of being a brave soldier. However, Chako soon learns that Sasuke is not that brave, but more of a coward and she decides to decline his love.

Chako returns to her human shortly after.