Reicarnated as a Hyuga in the Warring States Period

3 years later.

A child was practicing the katas of the Gentle Fist against a tree. His movements were precise and strong. A puddle of sweat was a testament to the hours he had spent practicing. He is Hezel Hyuga, ex Thirty-one.

After he had unlocked his chakra he expressed his desire of being trained. His mother was against it at the beginning but under the persuasion of his father and the interjection of the Hyuga Patriarch, she relented.

From that day, his time had been divided into physical conditioning, the practice of the gentle fist, and lessons on reading and the clan's history and traditions. All under the supervision of different branch house members.

Hezel had as his objective the unlocking of the byakugan. There were two prerequisites to unlock it: enough chakra and a strong body.

Chakra was made from two energies: physical(Yang) and spiritual(Yin). Thanks to his incredibly high Yin energy, Hezel's chakra was at a high-genin level. So his chakra was more than enough to sustain the byakugan. The fact that at 3 years old his body was almost good enough to support the byakugan was a testament to his efforts during these years.

But this wasn't the biggest thing that happened these years. In his opinion, nothing can compare to the fact that he had got a beautiful little sister. With the temporary name Thirty-two, she was the cutest thing he had ever seen. The day that her tiny hand closed on his outstretched finger was the day he swore to do his utmost to make her happy.

Hezel finished his training and started meditating. Though he had already unlocked his chakra he maintained the habit to try to sense natural energy. Since then there has not been any progress, but it wasn't without gains. By trying to calm and empty his mind he was able to control his Yin energy better, and sense chakra around himself.

Becoming a chakra sensor wasn't in his plans, especially given that with the byakugan active it would be redundant. But he didn't complain since it could be useful for sensing sneak attacks when the byakugan was off.

Finished his meditation session Amino passed him a towel. "Good work, Young Master Hezel. It's always a marvel to watch you, your progress with the Gentle Fist has reached its peak without the aid of the byakugan."

Hezel smiled and, while drying his sweat, replied: "Thank you, Amino. Is always good to have someone as thoughtful as you by my side."

Amino smiled warmly but didn't reply and gave him a water bottle.

Hezel drank it up and, just as he was rested and was going to resume training, he felt something click. A mixture of Yin energy and chakra moved from his brain and his dantian to his eyes. Veins started appearing around his eyes and could perfectly see everything 30 meters around himself in a 360° view.

For a moment he remained stunned making sense of the flux of information in his brain.

"Congratulations Young Master. You are living up to the expectations of a young genius. Go and talk to your father, I am sure he will be delighted."

"Thank you, Amino. I will go now."