Yotsuki Seiji was born to a family of ninja who were key to many successful skirmishes and wars in Kumogakure. Along with being apart of the clan that helped the Raikage consolidate the power over the ninja in Kumogakure. Seiji's was born during the first spring storm in Kumogakure, his grandmother felt that was a good sign for her grandson. Though the only bad thing about that night was at the precise time that Seiji was born and brilliant lightning arc lit up the sky. Hours later it was told that Seijis father had been killed during a very vital mission. The mission was successful but only one member of that team made it back. With that, Seiji and his mother moved in with Seijis mothers parents.
Growing up with his mother and grandparents was a very great time for Seiji. His grandfather was and still a ninja of Kumogakure who now just continued in his craft of sword smithing. Seijis grandmother is cook and his mother once she was able had begun small missions, but mostly stayed home to raise her son. Seiji had always enjoyed being around his family, even going to the point at the age of 4 that he wanted to become a ninja and serve his clan and village. It was a very young age but his grandfather felt that this was a good sign and
thus began Seijis training. Seiji instantly took to his training, though his attitude was one that started soft and hardend as he continued down his road to being a ninja.
His grandfather and mother over saw Seijis training, there were times when he would train all day long. During this training Seiji learned a lot about the Yotsuki clan as well as the village they vowed to protect with their lives. He also learned that of the typical styles that most Yotsuki clan members used and employed. Upon learning this, Seiji had already expressed that he didn't want to be predictable. Which to his surprise his grandmother and mother decided to teach him their sword styles, and upon completion of learning those techniques he would learn a second style which his grandfather would later teach him.
Seiji had a small group of friends who he hung out with constantly near the cliffs. Him and his friends pretty much just sat around goofing off which was a change for Seiji due to his clan constantly being serious all the time. He didn't like to constantly have a permanent frown on his face all the time. Though he did notice that there was always a call for a few Yotsuki to go on missions. But he knew that soon time would come that he and his friends would be joining other members of the village on missions. But for the most part they just enjoyed each others company. Seiji had taken to dancing which pretty much came easy to him due to a lot of his training giving him that extra agility. He was looked upon as too laid back, but that didn't bother Seiji one bit, he knew when he needed to act a certain way when the time came for it.
At the age of ten, Seiji and many other lower rank genin who were being trained by parents, clans etc, were then informed of the new academy that they were to attend. Feeling that the academy would be pretty fun, he was one of the first students to attend the academy and he found that the academy to pretty fun. Seiji wasn't no where near shy and was able to make quite a few friends. Now that he was around more kids his age he was able to express himself more. He did get into his fair share of trouble like, knicking his shuriken instructor while trying to throw two shruiken at a bullseye. He did manage to get one of the shuriken to hit where he wanted.
That day he found himself in the presence of the same teacher after school for punishment. Seiji graduated two years later. One of their tests for graduation was to create a technique that was supposed to be E-Rank. They were told this two months before the graduation exams. With this Seiji wanted to be better then going for an e-rank technique, he felt that such a low level technique wouldn't be good enough. He had already learned quite a few low level techniques. He also knew that he needed the extra time due to his sealing skills not being the greatest. He had began coming up with ideas as well trying to incorporate a few of his basic techniques into his sword techniques.
He told his family of what he was trying to do, his grandfather smiled and decided that for the next two months the two would work exclusively. He was understanding the basics of the sword style of his mother and grandmother. Along with this, his grandfather promised him that upon graduating he would have a surprise. Seiji immediately asked for a specially made sword. His grandfather only laughed and told him they would have to see.
For two months Seiji worked on his school studies and trained, his skills with the sword were becoming more and more refined the more he trained as well as his goofing off. After a long training stent, Seiji had left home to go to the cliffs. Upon arriving at the cliffs, Seiji had smelled that there was a storm coming and soon. He wasn't planning on staying there long, but long enough to get a few of his thoughts together. But as he sat and stared up into the clouds, he watched as lightning began to flash throughout the sky. It never struck in the same place twice, but it also seem to have varying effects. Upon watching he took the sword he had and began going through his kata, putting into motion some of his techniques his grandfather was teaching him. He knew then and there that he was going to have something special when he graduated.
Two months had gone by fairly quickly and even though he did have problems with his sealing, when it was time to show their new techniques, Seiji asked to go outside. Permission was granted and the students and teacher came out with him. Taking a few moments, Kai had began going through his kata, something he didn't want to do but as he neared the end, his hands flashed through seals, he did a sword thrust which as he completed the thrust, lightning arced through him then shot from his bladed to blow a hole into a training post. The size
of the hole was about the size bottle cap and it entered four inches into the wood post. His sensei nodded his head and passed him.
Since his graduation, Seiji has continuing honing his skills, aiming to become Chuunin he has entered into the next set of training for his families sword style which his goal is to master the style.