John

Breed: German Shepherd
Affiliation: Ouu Army
Debut: Chapter 4 (GNG)
Age: 3-4 (GNG), 16 (GDW)

John is Hidetoshi's well-trained German shepherd dog, who left his owner and went after Gin. He is a brave dog and a bit arrogant at times, but very good at fighting.

In GDW, he is a very loyal friend and adjutant to Gin.

During the Hougen arc, John was killed along with Lefty, Tommy, and Rossi to give Hiro and Reika a chance to escape.