Wilson is a former circus dog and later an Ohu soldier works as a source of information.
Wilson is a calm and wise dog, but the fate of his son and mate made him out of his mind and he almost killed young Tesshin.
He has a lot useful information as he has seen the world. He was a very skilled circus dog, knowing many tricks.
Wilson is generally rational and doesn't do anything reckless. He is best at giving information but is also a good fighter.
Ginga Nagareboshi Gin
A month ago before his first appearance in the story, the circus came to Mie. There, his family was attacked by vicious Kurojaki who killed Londow and kidnapped Lean. Wilson went to search for his wife and only found her bones from a cave as she was eaten by Kurojaki and his followers.
Wilson wanted revenge and kidnapped Kurojaki's son Chibi, wanting to make the Koga leader suffer as much as he did, to throw off a cliff. Kurojaki tries to attack him and pushes him off the cliff (and his son along with him, accidentally). When Cross tries to save the puppy, she too falls.
He was the one who told the others the story of the Harpooned Bear. Wilson survives the final battle and stays in Ouu mountains.
When there's conflict against Reima's wolves, Wilson is sent to fetch armies from Kyuushuu and Shikoku to help. Moss leads their army into Reima's palace.
Wilson swims to Hokkaido along with the others and leads the army to fight and defeat Gaia's one. After the battle, he returns to Ouu.
Ginga Densetsu Weed
Wilson is from Kagetora's group and meets Weed in the mountains. He says the puppy looks a little too much like Gin, even though he doesn't know that Weed is Gin's son. Also he joins Weed together with his leader Kagetora. Throughout most of the manga, he appears as a side character in the background of the story.
Although he does not formerly appear, there is a collie background character who is speculated to be Wilson.
- It's unknown whether this old collie is really Wilson or just a random old collie in the Ginga Densetsu Weed manga and anime.