Kotetsu is the younger brother of Koyuki, and the reason why Weed and Koyuki met.
He is white Kishu Inu with a blue collar. He have brown eyes (sometime blue eyes).
In Ginga Densetsu Weed: Orion, he has burn scars around his face and body.
He admires Ohu soldiers, especially Weed, and is interested in the life of a wild dog.
He was once a little mischievous puppy, but even then his very brave and faithful to his comrades.
In Ginga Densetsu Weed: Orion, Kotetsu has grown up a bit as an uncle to Weed and Koyuki's kids. He is protective of them like when he tried to defend Rigel from the kai ken hunters.
Ginga Legend/Densetsu Weed=
Ginga Densetsu Weed
Ginga Densetsu Weed: Orion
Ginga: The Last Wars
Ginga Densetsu Noah