Lee-Sin was born in Sunagakure, to an obscure family in the community. He never knew his Mother and Father that well, and can barely remember the time he spent in Suna. He was just three years old when the Third Kazekage was murdered, and it was found out that his family played a part in the assassination. His mother was killed, but Lee and his father fled the village, escaping, and returning to their original home, Amegakure. Lee-Sin missed his mother, and the desert seemed to fit him more than the rainy city of Amegakure. Under his father’s guidance, at age four, Lee-Sin begin training, going through a heavy regiment of physical work outs, and tough mental training. Lee loved the trainings, and saw them as an outlet for frustration and anger, especially that of the death of his mother. As the training became harder, Lee-Sin became stronger. He underwent this heaving training until he was the age of six, when he joined Amegakure’s Ninja Academy.
During the first day of school, Lee-sin was sparring another you man, and he inadvertently hurt the child, from the speed and strength he had developed. But after the incident, and to his father’s disapproval, Lee-Sin was careful not to hurt anyone else. Maintaining the same level of physical and mental discipline, he advanced quickly through the ranks, and graduated as a Gennin two years before the rest of his class. Throughout class, he was noted for having a passion for truth and reason, rather than dreaming like the others.
After two more years of training, Lee-Sin entered the Chunnin Exams. At his time, he had discovered a huge natural affinity towards Raiton jutsus, and was far ahead in elemental chakra manipulation than others of his age. In combination with his lightning affinities, and the physical prowess he had trained for so long, he passed through the trials on his first attempt. Soon, after, Lee-Sin’s father taught him his own elemental affinity, Fuuton. Though not as good as ration, Lee-Sin learned quickly and mastered his second elemental chakra type. His father, extremely proud, took Lee-Sin in secret to Sunagakure, where they visited his mother’s grave. Filled with emotion, he vowed to become as strong as possible to make her proud. That night, while Lee was at his mother’s grave, his father came to him, and confessed that he had trained Lee-Sin to take vengeance upon the men that killed his mother. Horrified, Lee-Sin ran from his father, and to his astonishment, moved at near instantaneous speed back to their room at the inn. It was here that he discovered the Kekkei Genki deep within him, combining both his Raiton and Fuuton nature in to another nature type altogether.
After a few hours, there was a knock at his door. He opened it to reveal his father, covered him blood. His father was rambling about taking revenge, and attacked Lee-Sin in a flurry, bringing a kunai to his throat. Using his newly discovered speed, he evaded and fought off his father, but in the end it wasn’t enough. He father caught him across the top of Lee-sin’s eyes with the kunai, cutting him deeply and leaving a heavy scar. After realizing the seriousness of the situation, something inside Lee-Sin changed. He then killed his father swiftly and without remorse.
From that day on, Lee-Sin roamed the world, searching for a purpose. He continued trainings, and spent time in nearly all of the great villages. In a large city in the Land of Wind, he met two men, named Gavin and Wesley, who helped him along his way, while also training with him, boosting his already incredible physical speed and strength. He left soon after, noting a rash and unfriendly side of the man named Wesley..
He continued his travels, until he met an insane man, who mumbled between drinks and women about a sacred place. Intrigued, Lee-Sin bought the man, named TJ, a drink, and managed to get two revelations: One, the man was completely and totally insane. Two, the sacred place he spoke of existed. After several more drinks, Lee-Sin managed to snag the man’s map, and made his way to the strange land. There, he found peace, and grew in to a monk of the region. He discovered a long lost lineage of monks, and picked up their preaching, satisfying his passion for truth and reason. He learned the ways of old, and eventually set out in to the Ninja World, to help people realize the truth around them.