3rd person pov

Y/n and the others stood before the Beyond Aizen who growled.  Things on Earth began to change as Sajin swung at Kaname who blocked with ease before summoning a shadow like blade. As Kaname went to slash the Captain Irina blasted the blade away with  holy energy. Ichigo took this time to knock him back. Kusaka went to to freeze Rangiku only for Toshiro to arrive.

Kusaka;  So your going to stand against me once more...Shiro?

Toshiro: I'm sorry ..once you were my dearest friend...and a man I even grew some love for. But this time everything will change. I hesitated to kill you back then this time I'll put you out of your mercy. 

Kusaka gritted his teeth before charging at Toshiro in his Bankai.

Kusaka: TOSHIRO !!!!!!!!!

Toshiro activated her own as she blocked his attack leaving ice to cover the area.  Up with Y/n flew at Aizen with a blast causing him to shield it. As the energy flowed around Aizen Gin flashstepped behind him.

Gin: Your reign as a God is coming to a end.

Aizen(Beyond: I....I will become the   perfect being.....NO MATTER THE COST!!!!! NONE WILL STOP ME LEAST OF ALL ANTS LIKE YOU!!!!

Gin summoned a white clothe before cutting Aizen's shield in half. When he did Gin jumped aside as Asura flew at the Beyond with a powerful  punch.

Asura: TO HELL WITH YOUR PERFECTION!!! I TO ME ALL YOU ARE IS ANOTHER FOOL WHO WANTS TO RULE THE WORLD!!! USING OTHERS TO DO WHAT THEY CANNOT DO FOR THEMSELVES!!!!

Asura began to unleash a barrage of blows at Aizen with each blow getting stronger. 

Aizen(Beyond): H-HOW CAN YOU BE SO POWERFUL?!

Asura: PAIN IS MY STRENGTH AND HATE  GUIDES MY FISTS!  NO MATTER WHAT I ENDURE  I WILL ALWAYS FIGHT FOR HER!! MITHRA'S CRIES BURN GREATER THAN ANY OTHER PAIN AND I WONT' STOP UNTIL I SEE HER SMILE COME BACK! FOR MY DAUGHTER I'LL EVERY GOD JUST SO HER SADNESS WILL FADE!!!!!!!

Asura roared  as he punched Aizen unleashing a blast of kinetic energy.

Asura: NOW SUFFER MY WRATH!!

When Aizen was blasted back Nelliel threw her lance at Aizen piercing him. Aizen's  face filled with shock but quickly swung at her. The Arrancar  blocked with her legs before he growled then vanished upwards. Y/n appeared behind him going to slash him, only for Aizen's wings to block it. Y/n saw the wing's form blades causing him to curse before jumping back towards the others.

Aizen(Beyond) : I've absorbed and mastered the Hogyoku. I've even allowed myself to become one with the Oken.  My power is absolute and I made sure other universe knew this! Many fell by my hand Soul Societies, Hueco Mundos, Entire worlds fell to me. 

Aizen's body glowed purple as Clones began to appear from him.

Aizen(Beyond): So Why

Aizen (beyond) 2: Why?!

Aizen (Beyond)3: WHY?!

Aizen (Beyond) 4; Why would a TRUE GOD lose to the likes of you?!

Gin: Because you've given up something even Gods embrace;Humanity.

Haribel: Gods  who create take  pity on their own creations. Give them heart and let them grow with another. 

Y/n: All you've ever done and use and take from those around you. Your willing to sacrifice  everything to stand where everyone can't. Mortals were never meant to be gods especially those controlled by greed like you.

Nelliel: Don't you get it you lack what makes a being  perfect;Knowing perfection is a lie and embrace their faults.

Aizen(beyond): Then...I'LL JUST ERASE ALL AND START OVER! I'LL ASCEND  ABOVE EVEN THAT ALMIGHTY QUINCY CAN DREAM OF!!!

Y/n: Almighty? I don't know who the hell your taking about. But when I face him I'll beat him too just like you. 

The Beyond Aizen unleashed  his clones at everyone causing the others to charge ahead.  Haribel  slashed one down down before her body glowed. As she raised her blade arm she swung it causing blast of water to kill 40 more clones.

Harribel: Dientes de Tiburon.

Gin formed a sword in his hand before  he spun around. While he did the Blade rapidly extended  and pierced through many of the Aizens.

Gin: Shinjitsu No Megumi (A/n: Translated equals Truthful Grace)

Y/n  slashed through ones chest before spinning around and blocking another's blow. Y/n knocked it's blade out of it's hand before wrapping Mugetsu around his blade. Y/n roared out as he slashed through it killing to more with it. Y/n saw Asura  send one flying into the sun before he spoke.

Asura; There is no limit to these bastards. Everyone we kill leaves ten more to take it's place

Y/n: I know but maybe if we kill the original that'll change. Asura I'll need your help to do this though. 

Asura:  If it means killing that bastard then i'm in.

Y/n:Alright then I need everyone to clear us a path!

Nelliel: leave that to me Y/n!

Nell charged forward  while slashing down the clones before a tornado of spirit energy flowed around her. As Pink energy bursted from her Lance she rained down blast onto the Beyond Aizens.

Nelliel :Lanza De Lez Gamuza!

Y/n and Asura flew at Aizen both filled with unrelenting resolve. Y/n's spirit energy bursted out before he fired a massive Mugetsu at Aizen who tried to dodge it. But when he did Asura was seen behind him . Asura  grabbed Y/n's attack before be condensed it and punched it back at Aizen.  

Aizen(Beyond):T-THIS CAN'T BE!!

Y/n: Believe it Aizen it's time for you to die!

Y/n fired another as Aizen before the others fired their own attacks. As Aizen was slowly overwhelmed Gin landed the finishing blow killing him once and for all. 

(Meanwhile back on Earth)

The Orc  unleashed a storm of attacks upon the beyond Ulquiorra who seemed to finally get bruised.  Sairaorg  saw Beyond Grimmjow about to kill them before Riser took the attack.

Riser:NO WAY IN HELL RISER WILL LET THAT HAPPEN!

Riser fired flames at the Beyond managing to blind him. Not wasting this chance Ginjo and Sairaorg  flew at the Beyond then attacked him.

Grimmjow(Beyond): How in the hell is this happening?! I-It's like my powers are fading!

Sirzechs: I guess must have managed to kill the source of all this.

Azazel: Then how about we finally finish things on our end?

Saiji summoned his sacred gear then  fired it at Grimmjow before beginning to drain his power even more.

Grimmjow (Beyond):D-DAMN YOU DEVILS STOP LOOKING DOWN ON ME!!!

Sona and Tsubaki  fired magic to stun him before Saiji yelled out to Izzy.

Saiji: NOW HYOUDOU THIS IS YOUR CHANCE!

Izzy;*nods* RIGHT THANKS SAIJI!

When Izzy blasted towards Beyond Grimmjow she boosted her power. With Every boost her mind filled with the memories of all of her fights.  Every villain had looked down on her seeing her as weak. In truth she hated feeling like that; despised always having to be saved by Y/n. Izzy closed her eyes then took a deep breath.

Izzy:(mind) I've always been looked down on by others. Always  having to rely on everyone else. This time things will be different..I...I won't rely on Y/n to win. 

As Izzy's eyes open she let out a roar as she unleashed a dragon shot to consume The Beyond Grimmjow.

Izzy: THIS TIME I'LL WIN FOR EVERYONE AND SHOW I CAN FIGHT JUST LIKE Y/N!!!!!

As the Beyond was consumed by the blast Izzy fell to the ground. while she did she was caught  by Chad.  As Rias and the others ran to check on her they saw Izzy weakly staring.

Izzy: *smiles* I...I did it..I hope Y-Y/n was watching.

Rias;*Smiles* I'm sure he was Izzy I'm proud of you.

Timeskip brought to you by these

3rd person pov

As minutes passed Sajin and the others slowly leaved Kaname in taters as Sajin prepared to end the fight. 

Sajin: This is farewell my dear friend. May you finally  have peace.

As Sajin finally killed him the darkness faded before he shed one last tear.

Sajin: I will always see you as my brother Kaname.

As the Beyond  Ulquiorra soon faded aswell leaving Toshiro to finish off Kusaka.

Toshiro: It's all over Kusaka your alone.

Kusaka: I..I WON'T GIVE UP! I'LL JUST GO TO ANOTHER DIMENSION AND START OVER- 

Suddenly Y/n appeared and grabbed Kusaka's arm.

Y/n: Not this time..It's all over...the chaos you caused is all over.

Toshiro: Y/n?

Y/n: Go on Toshiro you deserve to land the final blow. I won't do anything to him.

Toshiro's face filled with slight blush as she tears of joy fell from her face.

Toshiro: Thank you...Y/n..L/n.

When Toshiro charged at Kusaka her blade slammed into his chest. With a silent scream the man was frozen still. As the man shattered Y/n stared into Toshiro's eyes seeing her sorrow fade.

Toshiro:  Thank you for this Y/n...I swear I'll make it up to you one day.

Y/n smiled before hugging her causing her to stare in shock. Before she could say anything Y/n spoke with a gentle voice.

Y/n: You can by not letting your emotions stay so bottled up Toshiro . If your hurt like this again don't be afraid to lean on us for help.

As she clenched her fist her face went red as she smiled. When she looked up at Y/n she spoke once more.

Toshiro: It's captain Hitsugaya to you...idiot. But I guess I'll let it slide this once.

As the fight was finally over Y/n saw Mithra and hugging Asura who's held her close.

Mithra:Father I'm so glad your ok!

Asura: I won't leave you again Mithra...I promise.

Y/n: I'm glad to see you two are finally together again. What will you do now?

Asura: I...I have fought enough.. Mithra needs me... I will not leave her side again.

Y/n offered Asura a fist bump as he stop with a grin.

Y/n: Then I guess it's settled you protect the one you cherish and i'll fight like hell for mine. Asura I want you to know your a honorable and strong fighter. Your the greatest father in the universe..

Asura smiled before returning Y/n's fist bump.

Asura: I was wrong about you.. I no longer see you as a enemy.. but a dear friend.

Everyone stared in awe as Asura and Mithra's bodies began to fade before their eyes.

Gasper: W-what's happening to them?

Y/n: They are returning home...where they belong.

Mithra:*Smiles*Thank you all...even if this was temporary I want you to know I wish you all a wonderful future!

Rias: You aswell Mithra we won't forget you!

When they finally faded Y/n and the others returned home. After Y/n cleaned himself off he went into his room. When he did he saws Asia and Akeno laying on his bed.

Asia:A-Are you feeling ok Y/n?

Akeno: You look down hubby.

Y/n: Yeah... I just can't help but wonder how things would have been. What  if  Asura  actually managed to live a normal life?

Akeno: Asura really was a amazing dad huh? But you wanna know something? I bet one day you'll be just as good  of a father.

Y/n kissed her when suddenly Ophis arrived in his room. Y/n stared at her confused as she stared at him with a smile.

Y/n: Uhh can I help you?

Ophis: Y/n L/n I am Ophis the  Infinite Dragon God and starting today i've chosen for you to be my mate.

Y/n: WAIT WHAT?!

To be continued