An unused character that was going to be in an OCT I was helping concept, but never came to be.

Born and raised in what is now Icirrus City, he became a soldier at a young age when the country was in civil war.
Though not a masterful swordsman at first he managed to survive while his platoon trekked all the way to Kalos.
While there, Murasama came across a mysterious sword. When he held it, he seemed to feel that it was somehow alive.
Upon his return to Unova, he sped up in ranks, soldiers around him were convinced that he that he had some sort of magic, having been not that great when he started, but now was almost unbeatable.
When he reached the rank of General, he lead his forces repeated victory. His swordsmanship was so great, that he earned the moniker of Onimusha, or Demon Warrior.

According to Legend, he defended Icirrus City against the mighty Black and White dragons. Because of this, his village started the tradition of training only the Oshawott line. It is common belief in his village that the modern day Oshawott's are descended of Murasama's Samurott Mitsuhide.