Teru, also briefly known as Kōta (jap. 幸太), is a young member of Kyōshirō's pack.
Teru is a bicolored orange and white unknown mix with brown eyes.
In the anime his fur is more brown and cream in color.
When he is first introduced, Teru is a skittish puppy and afraid of his father. After he is rescued, he comes to respect and look up to Kyōshirō. When his father was being tortured, Teru did nothing to help and even declared that he was not his son. Teru showed a bit of bravery when he faked a suicide sentence (Thunder and Lecter held him hostage and threatened to kill him) and when he attacked Lecter.
After spending some time with the Kōga elder and the Kōga Clan, Teru's bravery grew. He seems to possess a possible leadership position and lead the Junior Ninja Dogs to save the Ōu Army.
Teru is less than six months old puppy who is constantly beaten up badly by his father.
His father beats him up and accuses him of either letting a thief steal their food or for eating it without permission. Kyōshirō shows up and attacks his father, chasing him.
The fight breaks loose and Kōta is saved, but his father was fatally wounded. Before his father dies, he begs for Kōta's forgiveness, which Kōta then gives him.
Thanks to his father's change, Kyōshirō gave Kōta back the name his father gave him, Teru. Teru follows along with Kyōshirō as he joins Weed.
Although Teru is a scared little puppy, he has shown some bravery at some occasions, for example, when he saw Weed, who was trying to show respect, and got kicked by the disgusted Kamakiri, he attacks the old Irish Wolfhound, but he gets himself injured as well.
Despite his injury, he had also defended Reika from getting mauled by Kamakiri's minions while the pack was fighting. Fortunately, both Weed's and Kamakiri's packs had retreated from Ron's warning barks before the hunters could shoot them.
Teru was also rescued by Ron, who had brought him back and joined Weed's pack as well. In the end, he was left with The Kōga Elder together with the rest of the pups as Weed would not risk the second generations' lives.
In the Hokkaido arc, when Viktor attacks Hokkaido, Kyōshirō rushes to get help from the Kogas and meets the now grown up Teru, who has been taught all sorts of ninja techniques. After Kyōshirō has a talk with the Kōga Elder, Teru and the other grown-up puppies join in with Kyōshirō to fight Viktor in Hokkaido.
Teru, Kyōshirō and the other Junior Ninja dogs were also taken captive along with the Ohu Army at the gorge by Viktor and the Russian Army Dogs.
On the following days, Teru was also seen fighting alongside with the Ohu army in the gorge. However, Teru had gotten himself wounded by Viktor when he tried to protect Gin by shielding his body. The blow from Viktor's fangs was so powerful it broke the back of Teru's neck, paralyzing him.
After the fight, Teru's fate is unknown.