Under Katori Sora's operation, the Hollow poison was continuously separated and expelled, and Unohana's arm rapidly recovered. After the poison was drawn out, the skin on her arm gradually returned to its original, fair complexion.
Despite being a master of the sword, there was not a single callus on Unohana's palm. As Sora held her hand, he could feel almost no warmth, as if he were holding a piece of cool, smooth.
In the end, Sora successfully and completely removed the 'Vasto Lorde'-class Hollow poison from Unohana's body.
"Professor Katori... really... dealt with 'Vasto Lorde'-class poison!" The students of the advanced Kaidō class were filled with amazement. Although they hadn't actually understood his procedure, seeing the extracted poison directly corrode through the operating table gave them a real impression of its potency. A swordsmanship instructor had solved a problem that even the Kaidō Professors could not, leaving the students astonished.
The Kaidō department Professors were also unable to comprehend why this new Professor Katori, with such a high level of Kaidō skill, would be teaching swordsmanship. Head Yamada was deeply ashamed; he had previously doubted such a skilled Kaidō master, and Sora's demonstrated ability left him with nowhere to hide his face.
"Katori-kun, it seems I misjudged you. To think I failed to discover a 'Kaidō genius' like you," Unohana said in astonishment. She was also shocked by the skill he had displayed. Katori Sora's Kaidō level was already very close to her own!
He had learned it from her, so she knew exactly what his level had been a few years ago. The ability he now showed was nothing short of miraculous progress; he could absolutely be called a genius of Kaidō! Unohana now desperately wanted to poach him and make him her lieutenant. The vice-captain position in Squad 4 was currently vacant, and the talent of the current seated officers was somewhat mediocre, which was why she had come to the advanced class looking for promising candidates.
"In order to heal Batsunsai's Spiritual Core, I have been diligently studying Kaidō," Sora said, which was not a lie.
"Oh my~ Katori-kun's performance is truly captivating. Why don't you come back to Squad 4 with me right now and serve as my lieutenant?" Unohana said with a charming smile. She was even tempted to steal Batsunsai's chosen successor. Katori Sora had excellent talent in both swordsmanship and Kaidō, a perfect match for her own abilities; there were few such Shinigami in the entire Soul Society.
"Thank you for your kind offer, Captain Unohana, but my strength is still insufficient for the position of a lieutenant. Furthermore, I quite enjoy teaching at the academy. The students are the future of the Soul Society, and being able to impart knowledge and skills to them here is a very fulfilling task. I am very fond of this job," Sora declined.
Although the position of lieutenant was tempting, Sora was not willing to give up the opportunity to teach at the academy, as it was the key to his continued growth. Unohana was slightly taken aback; she could sense his sincerity. The students and Professors present were also moved. He had actually given up the chance to become the lieutenant of Squad 4 for the sake of teaching. How much he must love this job!
"That is truly a pity..." Unohana said, temporarily giving up, planning to find another opportunity to recruit him later. "However... I feel the poison has been completely removed from my body. When were you planning on letting go of my hand, Katori-kun?" she said with a soft smile.
Under normal circumstances, holding the hand of the first Kenpachi like this was tantamount to suicide.
"Ah... I was so caught up in the conversation I forgot..." Sora felt a chill and reluctantly let go of the beautiful woman's hand.
"Professor Katori, I never imagined your Kaidō skills were so incredible. I was blind before and offended you. Please, you must transfer to the Kaidō department! I will be retiring in a few years. If you were in the department, I believe you could quickly become the new department head!" Head Yamada, knowing he could not afford to offend such a genius, even used honorifics despite being much older than Sora, hoping to make up for his earlier transgression.
"Yes, with Professor Katori's skill, being in the Swordsmanship Department is a waste of your talent," Professor Kobayashi also sighed.
"You praise me too much. I feel the Swordsmanship Department suits me just fine," Sora said. He was still teaching the advanced swordsmanship class and the 6th-year class, and he didn't want to give up the chance to teach them before taking Yoruichi as a disciple.
"But... staying in the Swordsmanship Department is such a waste of your Kaidō talent!" Yamada insisted.
"Head Yamada, Katori-kun's swordsmanship is also quite excellent. It is not a waste of his talent for him to be in the Swordsmanship Department," Unohana said.
"Then the Swordsmanship Department is truly fortunate to have recruited a Professor like Professor Katori," Yamada said upon hearing this, not pressing the matter further.
"That's all for today's lecture," Unohana said. She had to go back and investigate this matter; that vial of 'Vasto Lorde'-class poison was not the teaching aid she had prepared. It was stored in Squad 4's reserves, a place no outsider could enter. She had to investigate thoroughly; it was possible there was a traitor in her squad.
After the lecture, Sora also left. Before departing, Unohana spoke to him again: "Katori-kun, until a more suitable candidate is found, the position of Squad 4's lieutenant will be kept for you. If you ever get tired of teaching, Squad 4 would be very happy to have you."
Head Yamada also said, "The same goes for the Kaidō department. If you are willing to transfer, I will definitely recommend you as the next department head!"
Sora replied, "Thank you for your high regard, but for now, I do not wish to leave the Swordsmanship Department."
Yamada thought for a moment and added, "I wonder if you have the time, Professor Katori? I would like to invite you to give a lecture to the advanced Kaidō class. If your skill is so high, we would be very honored!"
Sora's heart stirred. Giving a lecture to the advanced class might trigger the 'first-time teaching' reward for that course, which could be very lucrative. He readily agreed, "Please make the arrangements, Head Yamada. I would be happy to share my knowledge of Kaidō with the students."
"Then the students of the advanced Kaidō class are in for a treat!" Yamada smiled. "I will arrange it properly to avoid any conflict with your schedule."
After they left, Professor Kobayashi's face was full of admiration. "Professor Katori is amazing. Both Captain Unohana and Head Yamada think so highly of him!"
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