Shōta was one of Mari's three pups.
Ginga Densetsu Weed
A human captured Shōta and he was put into a shelter with other dogs. Mari was able to feed her puppy at nights when the human wasn't around. However, once the human saw Mari feeding her pup and the human struck Mari in anger. Mari was badly wounded, and tried to find the Ōu army to help her. Luckily some Ōu soldiers that were returning from Hokkaidō met Mari and she asked them for help. Weed, Rocket, Kyōshirō, Sasuke and GB freed all the trapped dogs and Shōta returned to his mother and siblings.