Name: Seiriyuu
Japanese name: N/A
Sex: Male
Breed: Sibirian husky

Seiriyuu is the son of Hakuro. He has three brothers named Genbu, Susaku and Byakko. Together with his brothers, Seiriyuu discovers the German shepherd, Jerome when he enters Hokkaido. They take him to their father, where they discuss the threat of the Russian invader, Victor who has entered Hokkaido as well.

Shortly after Jerome has left, Seiriyuu and his brothers bump into him again. This time, Jerome is seriously wounded after a fight with Victor. Seiriyuu takes Jerome to the Collie, Ram, where he can stay in safety until his wounds has healed.

Seiriyuu then return to their father to plan an attack on Victor's pack to remove him from their island. However, they get ambushed during their planning, where Victor's pack attacks with full force. Seiriyuu gets killed by Allam during the fight.