Name: Jaguar
Japanese name: ジャガー
Sex: Male
Breed: Mastiff

Jaguar is the son of Moss. He comes to aid Weed along with his father in the fight against Hougen.

In the Hokkaido arc, Jaguar fights bravely against the Russian invader, Bozlef's soldiers. When his father, Moss, is killed by Bozlef and his soldiers; Jaguar avange his father's death by grapping Bozlef and crush his skull against a cliff.

Jaguar himself, badly wounded from the long fight, passes out as he kills Bozlef. After the fight, Jaguar is treated for his wounds by Gin's old owner, Daisuke and the doctor, Hidetoshi. After a couple of days, he is released again into the wild, where he reunites with the Ou army.