Last time (y/n) POV
The soul reapers and I were taking on Aizen, but we were losing ground fast, "Interesting, Ulquiorra seems to be showing more emotion than usual. It seems Eve has gotten to him somehow." Aizen said I looked over at where Eve was fighting and saw Ulquiorra had his tail around her neck, suddenly he shot a black cero through her, "EVE!" I shouted, "Ulquiorra! I'm going to make you pay for that! YOU'LL PAY WITH YOUR PATHETIC LIFE!" I said angrily as tears streamed down my face, suddenly Aizen stabbed me in the back.
Now (y/n) POV
"You should've known better to turn your back to me. And now you will die sad and alone." Aizen said, "Give her back." I said, "GIVE HER BACK RIGHT NOW!" I cried, "Shiryu...Full Release." I said as my spiritual pressure exploded around me and a full suit of armor encased me.
"(y/n), honey calm down." Rangiku said as I backhanded Aizen, "I'll be back for you." I said coldly as I flash stepped over to Ulquiorra, "Uryu make yourself useful and take Eve to Orihime or let Nel do it and get the hell out of my way. I don't care which at this point!" I said as Ulquiorra grabbed my helmet and tried to throw me, "Wait your turn, I'll kill you in a minute." I said coldly as I grabbed his arm and tore it off, "(Y/N) THAT WON'T WORK! HE HAS HIGH-SPEED REGENERATION!" Uryu shouted, "I know. I'm just instilling as much fear into him as possible, think of it like basting a turkey, and do you know what I'm going to do to this fear turkey?" I said, "I...I'm lost." He said, "Well let me make it very simple and I'll use small words so you can understand. I'm going to kill it, I will eviscerate him so completely that if he would regenerate he will be nothing more than a fragment of his former self begging for a death that will never come because that is the living hell I will personally create for him." I said, "What happened to you?!" He said, "He murdered the one person I was living for...I've got nothing to lose and that means I'm not gonna hold back anymore." I said, "Don't you have two daughters?!" He said, "Not if I die here." I said as I walked over to Ulquiorra and pointed my finger at the center of his chest, "Cero...Oscuras." I said as I shot him, "I'm going to kill you with your moves, not mine, not my father's, yours." I said as I put my hands together and began to gather energy before extending it into a dark blue lance, "Lanza del Relámpago." I said before it took a more solid shape, "Eve wasn't kidding when she said I was stronger than my father. I learned how to do this one Saturday afternoon when I was bored and Eve was out with Blair and Juliet. What took you a lifetime to learn and master took me fifteen minutes and a feat of boredom to learn, master, and perfect." I said as I cut his arms off, "How are you this strong?" Ulquiorra said as he regenerated his arms, "Simple, I've always been strong, I've only gotten stronger because of my friends and loved ones. I honestly thought I hit my cap a while back, but I'm glad to see I was wrong." I said as I destroyed my lance causing it to explode.
Glynda POV
Vanessa, Cinder, and I were fighting Harribel when there was an explosion from where Eve was fighting, "My baby girl!" Vanessa said, "No the one fighting Ulquiorra before was nowhere near the explosion. The one who caused it was (y/n) Kurosaki." Harribel said, "M...My baby caused that?" I said in shock, "You cannot sense spiritual pressure can you?" She asked, "No we can't." Cinder said, "Well then allow me to tell you this, the girl named Eve was critically injured to the point of near-death, and now (y/n) believes he has nothing to lose if he were to die. So he is using the full extent of his power to show us that he is stronger than all those who stand before him. But at this rate, he's going to die and soon." Harribel said, "WHY?! WHY WILL MY SON DIE?!" I said, "Because at this rate he will lose the will to live and allow Ulquiorra to kill him. As a result lord, Aizen will kill all the opposition and take this world as his own." She said, "Why are you telling us this?!" Vanessa asked as she comforted me, "Because, I believe that (y/n) would be a far better leader than Lord Aizen. I can also see his potential and I want to witness it once he unlocks it." Harribel said, "Then help us!" I said, "Now why would I do that? You have all proven that you are all weak." Harribel said, "Because if (y/n) dies then nothing will stop his father from slaughtering you, but more importantly I will kill you." Uryu said, "So you will help us and tell me why you're really interested in (y/n)." He said. "You drive a hard bargain, Quincy." Harribel said.
Eve POV
'Why. Why am I so cold?' I thought as I watched (y/n), '(y/n) no you can't be here. You have to beat Aizen.' I thought, "(y/n)." I said weakly.
(y/n) POV
"(y/n)." Eve said weakly, suddenly her spiritual pressure exploded and when I looked back I saw her begin to hollowfy until she became a Vasto Lorde.
"E...Eve?" I said she looked at me and pointed her arm out towards me extending a blade-like claw and began to charge an attack, "THAT'S A CERO!" I said as she fired past me hitting Ulquoria, "(y/n), (y/n), (y/n) I told you I'd be back but you didn't listen to me. So naturally, I had to take over your cute little girlfriend's body!" Eve said, "White!" I said, "Ding ding ding. Give the boy a gold star! Now be smart and let me handle this." White said, "If even a single hair on her head is harmed I'll end you!" I said as I flash stepped away.
"Good you're back." Ichigo said, "Yeah." I said as I returned to my Bankai, suddenly he punched me, "YOU CAN'T GO OFF ON YOUR OWN IN THE MIDDLE OF A FIGHT! HONESTLY, WHAT HAS GLYNDA BEEN TEACHING YOU ALL THIS TIME?!" He shouted, "A whole hell of a lot more than you." I whispered, "What was that?!" he snapped, "Nothing just shut up, and let's get this over with." I said, "This training will be the most difficult you will ever go through. I could only train this way for 2,000 hours or just under three months. You will train in the Dangai Presipus World for over 87,000 hours." he said, "I'll be in there for ten years?!" I said in shock, "Time flows differently there, you'll only be away for about four hours. Everyone here can hold their own for that long. I had the Dangai's flow of time temporarily altered to accomplish this." he said as we entered the Dangai.
"What am I supposed to learn?" I asked, "Acceptance. Accept all your powers. All parts of yourself. The quarter Quincy party of you. Your inner demons, and the hollow in you. Not just your Soul Reaper half." Dad said as he stabbed two blades into the walls of the Dangai holding back the restrictive current. "What will I gain?" I asked, "Your full power and true zanpakuto." he said as I sat and meditated with my zanpakuto.
I found myself in my soul room. It had drastically changed it seemed darker and almost crumbled under its own weight. "You did this (y/n)." Black Shiryu said as I turned to face her.
"You took the weight of not one, but two worlds on your shoulders. Hiding all your pain from those around you. As a child, you did the same, but as an adult, you cannot continue to do this." White Shiryu said as I looked at her.
I found my demons standing in the shadows behind her. Including E.N.D. but I also found a warm light in the distance. "I'll address you all soon, but first there's a part of me that I've neglected my entire life. I need to acknowledge them first." I said as I walked to the light. "Hello there. It's nice to finally meet you, I'm Masaki." a woman said as she appeared from the light.
"I think it's time we get acquainted." she said sweetly.
It took me nearly all ten years to begin to accept all parts of myself but with the promise of continuing this process they agreed to help me, no I finally let them help me.
Eve POV
It's been four hours since (y/n) left to do whatever it was to win. "I'm back. Sorry for the wait." (y/n) said softly. He was a lot taller, his hair was as long as mine, and I couldn't feel his spiritual pressure, but I knew it was far greater than Aizen's, his shihakusho's right arm looked like bandages, and his left arm had strange armor on it, but the biggest change was in his Zanpakuto. One was small and the other looked normal in their Shikai.
"Bankai." he said as he crossed his blades unleashing his new Bankai.
"Shinjitsu Shiryu." he said softly.
(y/n) POV
"Shinjitsu Shiryu." I said softly, "With this blade, I shall end you." I said as I took a single step and appeared standing in front of Aizen. He tried to stab me, but his blade never so much as touched me, it was frozen in the air, in the space between it and me. "Why?! Why can't I stab you?!" Aizen asked frustrated, "Because you cannot overcome the distance in our powers. You cannot overwhelm the infinity between us now." I said as I stabbed his arm before grabbing him and flew off to a deserted area. "DIE!" Aizen shouted as he slashed at me, I lowered my spiritual pressure so he could hit me. I didn't just want to kill him, I wanted to destroy him in every way starting with his pride. As his blade hit me it slightly changed the landscape. I hit him with the flat of my blade and completely changed the landscape. I let him try to kill me for a bit blocking his every attack. "It's time to end this." I said as I raised my blade, "Requiem." I said as I slashed downward sending a wave of pitch-black spiritual energy flying at him cutting him in half. "With this, it is done." I said, "You assumed that would kill me, but you were wrong. I've dealt with far stronger than that." he said as he broke my blade and cut me deeply across my chest, "Now to take over this world and become its god." he said as he began to leave, "D-Don't you dare count me out yet!" I shouted as a bow of black reishi formed in my left hand and I shot him in the back severing his soul sheath and chain before I shot him with a far more powerful arrow obliterating him.