Kotetsu

小鉄
Breed: Kishu Kotetsu is Koyukirsquos younger brother. He find Weedrsquos pack and asks where his sister is. When the pack cannot help him he goes out to search himself. Soon he meets Weed who aid him in a fight against the stray Yuusuke and his gang. Kotetsu however looses his tail during the fight. When Koyuki is taken away by their master Kotetsu runs to Weed to tell him what has happened. Afterwords we donrsquot see Kotetsu for a long time. However Kotetsu miss his sister so much that he starts a journey to find her. When Kotetsu finds her Weed leaves the care of Koyuki to him because Weed has business to do in Hokkaido. source: GingaSite.net