Prologue

Retsu Unohana shunpoed down the streets of the Seireitei carrying a bundle is her arms. She was on her way to her to see one of her closest friends, Yoruichi Shihoin. Yoruichi was planning on fleeing Soul Society with her lover, Kisuke Urahara, and the ex Kido Corps commander, Tessai Tsukabishi. Unohana knew that the accusations against Kisuke were false, Kisuke had informed her of his plan to rescue the taichou and fukutaichou, and of his suspicion of the 5th division lieutenant. So now the 4th division captain rushed to catch the Goddess of the Flash before she left so that she could give her the bundle before the Central 46 decided to do something drastic.

Retsu arrived at the secret training ground under Sokyoku Hill just as ten people and one cat were about to go through a Senkaimon to the living world. All of the figures turned as soon as they felt Retsu's presence enter the training grounds. The eight newly made Visoreds took a defensive stance and prepared to draw their Zanpakutos as she reached them.

"Wait, I mean no harm. I just want to ask you a favor before you go," the normally smiling taichou said, looking like she was going to cry. She knew she had to be quick, her secret lover, Kenpachi Zaraki, could only keep everyone's attention for so long. "I need you to take her. I fear that Central 46 will do something drastic once her powers come in. Her reiatsu is already that of a 3rd or 4th seat and once her powers come in she will easily surpass all of the taichou, including the Soutaichou."

Everyone present was shocked they had never seen Retsu so panicked. They exchanged looks, they all came to the silent conclusion that they couldn't deny her, she had helped all of them so many times, and to see the former Kenpachi so distressed frightened them all. Urahara stepped forward holding out his arms to take the child wrapped in a blanket.

"I will take her and help her control her powers. I just have two questions. One, what is her name? And two do you want us to tell her about this, why she is with us?" Urahara spoke softly, trying to comfort the obviously grief stricken mother.

"Thank you so much, old friend. Her name is Grimm Zaraki," she said with a sad smile as she kissed the child on the head and passed her to Urahara. Everyone was shocked, this child was the product of two Kenpachi's it was no wonder that her reiatsu was so large. " And please do tell her once she is old enough to understand, I don't want her to think we abandoned her. But once Aizen begins his plan I want you to send her back, to help us and hopefully change how Soul Society works forever."

"Ok I will protect her with my life, I promise that no harm will come to your child. But I'm afraid we have to go now, I can tell that Zaraki-taichou's distraction is coming to an end. We will see you again, hopefully under better circumstances next time." The fugitive said.

"I understand, but one last thing, give this to her," Retsu handed Urahara a black and white photo of her, and Kenpachi. Kenpachi's arm was around the significantly smaller woman's shoulders and smiling down at her while she smiled at the camera, but the most shocking part was that Kenpachi's smile wasn't the bloodthirsty look that everyone was so used to seeing, it was soft and his eyes were filled with love.

"I will. Goodbye Unohana." And with one final wave the group of 12 left Soul Society. Leaving behind a crying Retsu.

Grimm was a strange child she grew like a human child would until she reached 17. She lived with the Visoreds, with regular visits from Urahara, who she had taken to calling Uncle Geta-boshi, and Tessai. Her Zanpakuto materialize on their own, without the use of an asauchi, in Shikai form when she was seven years old, right after Urahara had told her about her parents and why she was in the World of the Living (let's just say, she was less than pleased). Urahara kept his word and trained her to use her powers. She quickly became a master at Zanjutsu, Hakuda, Hoho and Kido. At ten she achieved Bankai.

Her Zanpakuto were quite odd, one was a fire type and the other was a water type, that had never happened before. They were a pair of daggers both the length of her forearms, and they grew with her. The water one had blue wrappings around the handle and a string that had a pendant with a wave on it. The fire one had red wrappings and string and a flame pendant. Each had a serrated edge, the fire Zanpakuto had was sharp zigzag pattern while the water Zanpakuto had a wave like pattern for the serration. They also changed her clothing, instead of the usual Shihakusho that all Shinigami wear, she wore purple bandages wrapped around her chest, leaving her stomach and arms bare, tight leather pants that hung low on her hips, a long black sleeveless coat that went to her feet and flared at the waist with purple on the inside it's collar can be fastened to cover the bottom portion of her face, with bandages wrapped around her feet and hands, and a brown leather belt that sat right above her pants and connected to her sheathes which wrapped around her upper thighs.

Grimm grew incredibly close to all of the ex taichou and fukutaichou. Especially the former 5th division taichou, Shinji Hirako, after about 70 years he finally broke down, with the help of Hiyori's sandal, and asked Grimm out. Now 101 years after they fled Soul Society it's finally time for Grimm to return and face the ones who want her dead.