Munechika is a minor character of Ginga Densetsu Noah.
Like every other wild dog in Japan, Munechika heard of the stories about the legendary dogs of Ouu and admired them greatly. Upon hearing that the Ouu Army needed help during the great war against Monsoon he left with his friends to help showing his kindness. As a leader, he responsible, caring and considerate towards his pack as he took it upon himself to find them a new place to live.
However he had a habit of jumping to conclusions when he and his friends arrived in Ohu, Munechika believed that the Ohu dogs gave up their home when actually they left to defeat Monsoon which left him a bit dejected. In that state, he came across the Aka-Ari Army telling that the Ohu Army was gone and fell for the villainous army's trap losing their nerve and their courage.
Upon seeing that the Ohu dogs were alive and well, admitting that he was wrong and with his courage restored thanks to Orion, he showed great bravery as he tried to rally the others to stand with the Ohu Army. He is also quite humble as Munechika apologized to Ohu Army for the damage the Aka-Ari Army caused and wished to make up for it by joining the Ohu warriors to stop them.
Like his son, Munechika is smart and clever, as he knew he wanted to get out of the iron paw of the Aka-Ari but realized it couldn't be done without help so he waited for his chance to strike.
Back then, during the war against Monsoon, Munechika and his friends Hikaru, Jack and Tora wanted to join the Ōu Army to help them in the fight. But half a year after the war, they still didn't returned home. None of the Ōu Army remembers their names.
He watched the Ouu Army fight against the Aka-Ari Army, after hearing Orion's speech on how a male dog should fight to defend those they care about, he approaches WanWan asking if he was okay after seeing the huge dog's violent outburst. As the fight continued, he rushed to Kyoshiro's defense, attacking Beniou revealing that he was never their solider and felt great shame for helping them. Revealing to the Ouu Army where he and his friends came from and that they were caught by the Aka-Ari Army and was forced to work for them. At hearing his son's name he was surprised asking the pack how they knew him but Kyoshiro only says it's along story and it would have to wait aware that the legendary Ouu Army was alive he tried to rally others to their cause of stopping the Aka-Ari brothers.
But the fighting was horribly interrupted when a meteor struck the area causing the land to be consumed by explosions and flames. Thanks to the fire workers Munechika and everyone managed to escape the blaze afterwards he was formally introduced to Weed hearing of the former supreme leader's skepticism, Munechika apologized on the behalf of everyone who fought against the Ohu dogs and that they didn't help sooner. Wanting to make amends, he asked if they could join Weed's pack hearing of Weed's and son's forgiveness and acceptance; Munechika regrettably admits that he was responsible for the Aka-Ari Army's conquest.
Munechika explains that he was aware of the Ohu Army's crisis against Monsoon and left to help but not only that due to the number of dogs in his territory. He also wanted to have the Ohu dogs permission to make paradise their new home but when his group got there he hastily believed that the dogs had fled defeated by Monsoon when actually they left to defeat to him. Then, on their way back they came across the Aka-Ari Army and that's when the rumor of the Ohu Army's demise had spread. With everyone getting a clear picture of what happened, Munechika, his friends and the abandoned Aka-Ari dogs join Weed's pack.