High Noon Yasuo Lore
> Yasuo is a deserter from the Continental Army (or what have you for this setting; I'd probably alter it to add a bit more flavor), accused of having killed his superior officer. Now one of the most notorious outlaws in the new world, he eludes the law he once enforced on a mission of justice, with only the wind at his side, the signature gunblade of the Army at his hip, and a lot of whiskey on hand.
Once a soldier in the Continental Army, Yasuo served alongside his brother for years before being assigned to the wild frontier. Ever since they were children, the two had dreamed of taming the frontier, bringing peace and order to a lawless land. As enlisted men, Yasuo acquired a taste for the frontier's lack of inhibitions and became something of a maverick among his comrades-in-arms. He got into a spat on more than one occasion with a fellow soldier. Of course, he never did anything that'd net him a reprimand, let alone a court martial, so he got away with it, but Yone started worrying for his brother. Eventually, Yasuo and Yone's unit came upon a town, and were immediately greeted with locals desperate for help. A gang of outlaws had fallen upon their town and had been terrorizing them for weeks on end, and the last sheriff had been shot dead for defying them. The townsfolk, given hope again by the arrival of the soldiers, expected the bandits would fall before a professional fighting force such as the legendary Continental Army. Yasuo and Yone's commanding officer agreed to rid the town of their oppressors.
> Now, I cannot think how to connect this bit with the next, but perhaps I should leave that to you.
As it turned out, the townsfolk themselves were the desperados, and tricked Yasuo, who had believed he had earned their trust. They killed the unit commander, and in a clever deception, shifted the blame onto Yasuo before fleeing. Unable to convince his comrades-in-arms of his innocence, the seemingly-damning evidence and his rebellious streak having sealed their opinions of him, Yasuo resisted arrest and managed to escape.
Yasuo was branded a traitor and a deserter, a fugitive from the law he once enforced. For a time, it was just trying to survive, to elude capture, but his memory of the faces of those twofaced criminals burned hot. Desperate to clear his name, he pursued them with abandon. Until, one day, his impatience caught up with him. His brother found him, but came alone. For a moment, Yasuo hoped that Yone would understand, that he'd listen to him. A dream proved in vain. Yone hadn't come to let Yasuo explain himself; he came to fight. Yasuo pleaded, on the love Yone held for him, but Yone told Yasuo he didn't recognize him anymore. The kid brother he knew wasn't the same man who had walked beside him weeks before; military life and the frontier changed him, and for the worse. He had become too deeply entwined with the men they sought to apprehend. Yone wouldn't, couldn't believe the truth wasn't what was apparent; the blood had to be on Yasuo's hands, and he needed to be stopped. But Yone came alone for a reason. For the love they once shared as brothers, Yone challenged his erstwhile brother to a duel. He couldn't walk away, knowing his brother to be a traitor and letting him escape justice, yet he couldn't let the man that was once his brother fall into the hands of the Continental Army either. He wouldn't be able to live with himself, knowing that he had condemned his brother, despite what had happened, to such a fate. The punishments of the Continental Army were just legendary as the army itself. Yone's words destroyed Yasuo, but he agreed to Yone's terms. A simple duel, according to custom, honorable. The fight took place in utter seclusion, with no witnesses for miles round. Only one man would walk away alive.
Yasuo buried Yone that morning. Unable to commit his brother to the earth without a shovel in the hard-packed ground, Yasuo reflected on what he had done. A murderer, a traitor, a deserter, and now a kinslayer. Even if he cleared his name of those first two accusations, he was the latter two in fact. But his hatred, no, more, his sense of justice could not accept the bandits' escape from justice. He was an outlaw now too, a fugitive, but he couldn't allow them to escape from justice. He couldn't let anyone escape it... even himself. He would hunt them to the ends of the brave new world, if that'd be what it took. Then and only then would he give himself over to answer for his own crimes. His honor was not lost.