Age 0 to 6; childhood years
Asshole parents are a universal thing, yo.
Toraburu was born as a result of two of the Senkensha clan being together. They were travelers, as so many Senkensha clan members are, and his mother happened to get pregnant at a time during the travelling. They rested at a village for the next five months until she was ready to give birth. When that was done, and the young lad 'Trouble' was born, the parents vanished. Possibly because the Senkensha clan enjoys their freedom, and having a young boy with them would impede on that freedom.
He was named Toraburu, because that was what he was to his new adoptive parents. 'Trouble'. It was a pretty harsh life the next six years, but luckily for Toraburu, Senkensha clan members weren't born with their cat like features. He seemed to be a relatively normal kid - up until his fifth birthday when his teeth were starting to protrude from his lips despite having his mouth closed, as well as his ears beginning to grow slightly. His adoptive parents still sort of loved him, but it became a lot harder for them to justify having this 'strange kid' in their household. Slowly but surely the village excluded them more and more until it became time for Toraburu to leave for the Shinobi village hidden in the Mountains.
He was accepted there, and joined the shinobi academy. From time to time he'd visit the village, to see his 'parents' but all in all it wasn't too much trouble to leave behind the family.
Age 6 to 13; academy years
Mreow! Don't mess with the cat!
During his years in the academy his rather peculiar personality traits became apparent. While at first everyone seemed to think that Toraburu was an extremely nice kid due to his appearance, they were often rudely awoken from their idiotic ideas as Toraburu had a rather foul mouth for a young boy. More often than not he was involved in school fights, incidents in the village and just general trouble. He was living up to his name, more or less. He made many enemies in these years, people that rather saw him bite the dust sooner or later. The feeling was, more often than not, mutual.
While he was a bit of a pain in the ass to the teachers, he did listen to them and he was by all means not a bad student - more likely due to innate ability to become a shinobi than hard work. He was the kid in class that never seemed to do anything, yet ace the exams. It was the beginning for his arrogance, since he noticed himself as well. What was he other than a master at shinobi arts, if he did not try hard at all and still succeeded? That placed him above the rest did it not? Whether his feelings were justified or not, he graduated somewhere in the top 10% of the class, giving him at least some credibility for his claims.
Age 13 to present day; genin years
WHA? They said this would be fun!
While others may have enjoyed these petty years, merely a small point in Toraburu's life. A life he expects and expected to be filled with more splendor and action and interesting things. But no, rather, he was stuck doing rather dull stuff for most his genin missions. He had a team that he didn't like very much but was forced to cooperate with. This only made his pains more unbearable. Digging trenches and taking care of ninken was hardly something he found enjoyable.
It was only when the chunin exams began that he found some.. degree of pleasure in the shinobi line of work. 'Kill?!' he asked his sensei, whom replied that yes, killing was a possibility. 'Anything to get that chunin rank' he thought, figuring he'd get to do more interesting shit then.
He quickly became somewhat of a feared aspect of the chunin exams - he basically physically dragged his team through the exams. And no, that's not figuratively, because he literally dragged a teammate through a battle, cause the little shit was planning to run away and abandon his teammates. During that little escapade he continued to fight his enemies, slinging jutsu left and right and even using the poor boy as a weapon at some point. Needless to say, it was quite peculiar, and perhaps not very fitting of a 'leadership figure' that a chunin was supposed to be. But hey, he passed the trial, so technically they couldn't say shit. Naturally he passed and became a chunin. Now the fun began.