Juushiro shook his head slowly. "Considering the unfortunate meeting we have had, I think I will let the training be for the moment. Take a seat and start asking your questions. I may or may not answer them fully at this time, but it should be a small compensation for the danger I have put you in."
The questions came out like water off of the side of a cliff. "First, why does Aizen want this Seraph? And why Captain Hitsugaya? Why not someone else?"
Juushiro held his hand up to stop the eager flow of words. "Calm down and breathe, relax while I answer those two before you continue."
"The answer to your first question, why does Aizen want the Seraph, must begin with answering what the Seraph is, and unfortunately, a little further explanation as to what Aizen did when he betrayed us and why."
"First, the Seraph. This Serah is not an angel of fire or something with grand powers like that. She is fast, make no mistake of that, but her true powers lie in knowledge. She has lived has a human for hundreds of years, undetected by anyone but other Godly beings and passing on information to their Realm each time she dies and is reincarnated. While living as a human, she was oblivious to her true herritage." Juushiro's eyes saddened. "Until Aizen found her."
"How Aizen found her I do not know - it doesn't matter at this point - but I can guess what led him to her in the first place, his unquenchable thirst for power. But he was able to find what should not have been found by mortals. He found, killed and shaped her into a being that would regain her memories yet still be in his power.
"Her name is Kita, and her soul is trapped in an arrancar's. When I last saw her, she knew what she was, but she had not regained her memories. She resists Aizen's control, something that I believe Aizen will not tolerate for long."
"Sousuke Aizen, as you know, has been labeled a traitor of Soul Society, of the worst kind. Most of what he did is not well known. He killed many people before he openly betrayed the Gotei 13, and if the Kurosaki hadn't been on a quest to save Rukia-chan, he might still be be here. His infiltration into our trust was that complete."
"We were useful to him, and would have continued to be, until someone was able to prove his true colors. The first time someone tried this it didn't work.
When Kisuke Urahara was branded mad and a traitor for the acts of experimenting with hollowification on shinigami, which is illegal. The truth, now learned, is that these experiments were among the first of Aizen's evil designs. Kisuke found Aizen's experiments when investigating disappearances and trying to save his lieutenant. As a result, he was framed for the crime. In fact, Aizen had the perfect alibi. He had been seen far away from the scene of the crime at the time Kisuke accused him. Kisuke was to be exiled to the Human World, stripped of his powers. Shihoin Yoruichi rescued him and his partner in crime, Tessai. All three vanished and, as you know, now live in the Human World."
"I knew those experiments weren't his," Tsukiro interrupted, glad to add something to the lesson. "I was still young when that happened, but as I grew up, I just knew that something wasn't right about the official happenings of that night."
"Perhaps that is why he was never pursued once he vanished to the Human World," Juushiro added and smiled. The bright nature faded as he decided to reveal everything he knew about Sousuke Aizen, to better prepare him for anything Aizen might attempt.