Jirobo was trapped by Sagen and Iga Ninjas; Jirob’s on the verge of death, but he's saved by a bizarre demon-entity. The secret Jirobo is guarding is of that kind of magnitude. It all started further back in time, in 1559, when Nagao Kagetora -eventually called Uesugi Kenshin- and Taehime, the Chief Advisor Konoe Sakahisa’s younger sister, had a small exchange of mutual feelings ...
Furthermore, he's a fighter dog, 
trained for battles.
Además,
Además,
Mais celui-ci a été spécialement entraîné
 pour aller au combat !
E um cão de combate, treinado para guerras.