Haruno Aoi was born the first child of Haruno Kizashi and his wife Haruno Mebuki; both jounin of Konohagakure.
He was smaller than most newborns with green eyes and bright pink hair. That strange color coupled with his unisex name would lead to a great deal of confusion with fellow academy students. Most would look at his small stature and effeminate face and believe he was a girl; a matter which wasn't helped by his mother's insistence to play dress up. It wasn't uncommon for Aoi to attend school with ribbons braided into his pink forelocks. Thankfully she eased up a bit once his sister Sakura was born.
Aoi wasn't particularly talented at ninjutsu or taijutsu. He was average at both though he far surpassed his classmates in chakra control and the only student with a higher IQ belonged to the Nara clan.
Normally this would be overlooked and Aoi would have been shoved into a desk position if not for one small blurb in the history text about Senju Tsunade.
During any given week Aoi would deal with the taunts of the other boys in his class. The teased him about his poor taijutsu skills and pushed him into the girls bathroom at least once a week. The teachers would step in if they noticed but most of the bullying took place out of sight. The frequent insults and calls of 'girly looking weirdo' led him to a strong desire for revenge. Not just to make them leave him alone but to make them burn with humiliation. He tried everything he could think of to get stronger but the books available to academy students weren't much help. In Fact most of his inspiration came from a short thirty minute lecture about chakra flow and story about the three legendary Sannin, more specifically the Legendary Medic.
The text was boring and mostly ignored; in fact the only paragraph Aoi ever bothered paying attention to was only three sentences.
"Senju Tsunade is the last known member of the Senju Clan, one of the founding clans of the Hidden Leaf Village. Known as one of the three Sannin Tsunade possesses the slug contract and is listed in every village's bingo book and has one of the largest recorded bounties though few have ever attempted to collect. She is best known for her great skills as a medic and her ability to shatter mountains with perfect chakra control."
Perfect chakra control, the line burned into Aoi's mind with perfect clarity. Over and Over he read that one paragraph before asking the academy instructor for more reference books about the Medic and any books about medical-ninjutsu.
Medical Ninjutsu was one of the only shelves in the library that was nearly always full since few in the village found it interesting. Scrolls full of knowledge which Aoi had all to himself.
Every free moment the boy had went into studying his chosen field and memorizing information about anatomy, biology and chemistry. Guide books on the properties of local plant life were memorized and Chakra control exercises were mastered almost as soon as they were introduced. It took months of research and practice before he managed to produce healing chakra and weeks more before he could put it to any practical use.
His first patient was a fish he kept breathing out of water by using medical chakra to pass oxygen through his gills and lungs without water. His second was a rat with its fight forepaw mutilated. Higher up the food chain he went healing Birds, alley cats and stray dogs until he was able to successfully repair cuts, bruises, torn muscles and broken bones. More advanced techniques required an experienced Medical ninja to teach him which wouldn't happen until he graduated from the academy.
In between library visits and classes Aoi began practicing any Chakra control exercise he read about in hopes of duplicating Tsunade's legendary strength. Tree walking was mastered on the first attempt and water walking barely took a day. Origami was first learned normally and then done by the careful manipulation of chakra spread over the paper to fold them into delicate cranes and butterflies. He learned to manipulate Chakra through nearly any part of his body and could even make a half decent chakra scalpel by the end of the year but still could not crack a boulder with his fist, although the attempts did give him an excellent opportunity to treat fractured fingers.
In fact it wasn't until his last year in the academy that he found the scroll which would let his recreate one of the Legendary Medics signature techniques. It was a thick never read scroll tucked into the corner of the library titles "The applied physics of chakra circulation in the human body."
The book was a gold mine for those with perfect chakra control like Aoi. Within months of discovering the text he was steadily building the force and speed behind his strikes. The image of Uchiha Daisuke's stunned face as Aoi shattered the training dummy during taijutsu practice was priceless. His personal tormentors seemed to disappear as he started winning the practical spars and climbed towards the top rankings in class, although he still lost frequently to Hyuuga Mamoru.
When his class graduated Aoi was placed on a team with Inuzuka Hana and Yamanaka Midori both were aspiring medics much like himself and the three were assigned to Tokebetsu Watanabe Kaede. A fairly high ranking medic who worked at the hospital whenever he had a break from Mission assignments. Which wasn't very often as there were few medics in a village that called for a high demand.
Under his Tutelage all three grew to become very fine medics as the years went on. Midori became a point of pride amongst her clan members as she developed countless poisons and antidotes popular amongst many of the ANBU members for being nearly untraceable and mimicking natural deaths. Hana became the main vet in charge of her clans Ninken. A very high point of honor amongst a clan who valued their canine partners more than they did themselves.
Aoi spent two years as a field medic after making Chunin where he accumulated a small fortune ( Field Medics were among the highest paid position in the village), a Fortune he used to open an academy dedicated solely to training medics. The academy offered open classes during a variety of hours which made it easy for academy students and fresh genin alike to take supplementary classes during their free time. While the class itself was popular in the beginning less than a quarter of the students made it past the chakra control exercises. In fact one of his first full time students was actually his little sister who basically used the lessons as an excuse to escape fro bullies.