A great story right, well it is the abridge version it is coming from a dead person's memory, and a few native vagabond stories. But unfortunately this part seems to be very vivid in her mind, in fact it's contribute to her now very nature. You see after a beautiful child was born from both, the eldest son and without anyone's knowledge of the third son things started to get a little bit more complicated. You see rumors started to spread around the eldest son was now the new emperor, but with the third son being missing there was no one to fight the title. They had hid what happened at the palace, but it seems their was still some problem slowly broiling underneath the surface. Due to his imprisonment it seems the Arrogant Prince was able to truly gain his title of the Shadow Oni that runs the dark corners of the region. It didn't take him long while in prison to corrupt his way back into the family. What with his brother living a blissful loving life with his wife and child oblivious to all his suffering on his sister's orders.
He was slowly raising his powers by simply chained has he hanged on the wall, with four sacred three feet long blackiron nails piercing each of his limbs there he stay with his jealousy and rage building. But slowly by allowing certain individuals into sensitive positions in the palace he creeped his influence back into the palace, there was a storm brewing and no one knew. He thought if he waited long enough he would have gotten the chance take back the throne that he believed was wrongfully taken from him. Then in another twist in just a few decades Yanagi was due for another child. When this news had reach the third prince's ears he knew things had to be done. Him being third son and since he only had two children, his second brother who mostly out of his plans to kill due to his timid nature he was always afraid of a fight only to have three kids. He had zero concerns about him now, at one point he was planning on using him as a puppet to run the kingdom under his rule. He knew is his eldest brother had two children from a direct bloodline of the emperor's favorite wife, he would forever lose his status even if you were to break out of the chains he was still be bonded but his eldest brother's rule.
This was a tipping point for him so he planned a coup against the Empire, then the war started the shogun's samurais were fighting with the dark ninja faction which was under the third son control. The battle raged on the streets of the capital samurai vs ninjas, common palace guards vs dark ronins innocent bystanders were slaughtered. He waited for his opportunity carefully, to avoid being courted by suitors the two sisters imbarked on their journey to the Gaza Forest which left the palace defenses weak. All that was left was for the second oldest brother relinquish his control over all the black web ninja clan, to be used in his Coup. All while still chained.
The fights in the streets raged on day and nights, innocents were killed mercilessly it would be known has the Blooded Oni's Festival. The third oldest brother bloodline's magic was very unique even within his family he happened to have gotten it from his mother, a true Oni who lost to his father in battle and became one of his concubines. Oni are a very vengeful spirits, that lives by their desires and don't like to be chained to anyone. The stronger their desires the more powerful they become, the darker the better. You see his mother had not one shred of love for the emperor her only goal was to create someone strong enough to kill him. And on her dying breaths while giving birth to his son, she announced her complete hatred towards the emperor she shouted "As I lay on this bed seeing you crawl out into this world covered in blood, so shall you crawl out of the blood of the corpses left behind by this Empire to rise above as the greatest creation the world has ever known!".
Has she holded her baby in her arms rubbing his head, bathing in the blood of the midwives who attended to her in the birthing process she continued to said. "I vow your greed shall be great never to be quenched, your power shall be has limitless as your arrogance!, my son Amayakasa Rete Sodatta be spoiled in blood with all my deepest desires". she was immediately beheaded while on the bed by the eldest son's mother and the first woman to the emperor the empress herself "Your curse might rot your son but it shall not hurt this Empire" she said. Those words from the empress was what resonated in the emperor's mind before he died which allowed him to clear all the negativities from his heart, it was also her who told him to not kill the child but to raise him.
Well back to the action, days became weeks, weeks became a months, the battles were dying down. But as soon as the major battles were being stomped out then came covert attacks, assassination, poisoning uncommon to the masses became commonplace for the Royal Family and their servants. But with the two older sister gone and the oldest brother completely oblivious to everything that was going on, The second oldest out of complete fear of his younger brother decided to do the unthinkable and freed him from his sealed shackles, Once freed He desperately pledge his loyalty to his younger brother. He accepted it on the condition of a shown proof of loyalty, He then ripped his brother right arm off. He screamed in agony as a blood sprayed over the prince's face with a gleam smile on it, This was the moment things got real.
Though this might look like the eldest brother was doing nothing, It was actually for a good cause. Even from birth, He was special, born from 'True Love', In all its purity. He has never known hardship or suffering of others he was completely blissfully unaware of the world outside of the palace ordered by the Empress and Emperor. Even as a child is bloodline's Magic was greater than everyone in the family by just wishing for peace and prosperity. He was granted such by the world, He only knew the world from the books he read and the people they would allow him to see. They would sings him praises and brings it back to the villagers, and the farmers who knew it was because of his happiness. And of his magic that they were able to live such a fruitful life. So how did this kind-hearted, cool boy managed to meets and falling love with the sharp tongue, mischievous, prankster of the fall, such as Yanagi and had such a calm lovely life no one knows but unfortunately these days were not going to last forever.