A/N : A world where Eren has an older sister named Bella Jaeger and Levi Ackerman is bit taller

.Also, an alive Sasha cause I love her so much.

Characters not mine. Just the imagination.

Also, spoilers ahead.

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* SURVEY CORPS *

That's all her younger brother had in his mind and mouth. Even Mikasa hated it, their mother kept on reprimanding the brat. He can't even survive a fist fight without Mikasa, how could he survive in the military?

She understood his fascination when her father took her to the training camp to visit an old friend, Keith Sadis. The ODM gear, hand-to-hand combat, guns and blades... For some reason it intrigued her.

It did break her mother's heart when she expressed her desire to join the military, but she hoped this would keep Eren away. She's rather do it than have her brother risk his life.

Top of her batch, she was offered a spot in the Military Police, a comfortable and safe position away from the titans. But she had her mind set on joining the Survey Corps.

* THE YEAGERS *

- BELLA JAEGER -

"You go right, I go left. Erwin, make a pathway for me to kill the Beast Titan."

By the time she had slain every passive titan on the right, Levi had the Beast Titan in a pinch. She backed him up by slicing the back of the giant titan's knee and Levi went on a full rampage, forcing the man inside out, pinning him down with his blade inside his mouth.

They both scanned to look for any sign of life from their sie. She knew what Levi was thinking... The serum. Maybe Erwin is still there... They could revive him...

Until she sensed a movement behind Levi and she threw her body towards him, dodging a gigantic mouth that tried to eat them.

A quadriplegic titan emerged and took the Beast Titan in her mouth as they ran away from them.

Levi kept his embrace around her waist tighter, "No, don't. We can't. We're almost out of gas. We're too exhausted to engage."

He collapsed his head back on the ground, thinking of Erwin and all their comrades who lost ther lives today, only for the Beast Titan to escape.

He let him escape. He should have killed him when he had the chance.

"It's not your fault. We were looking for someone who can devour him. We didn't know there's another abnormal," Bella said in a reassuring tone.

- ZEKE JAEGER -

Pieck saved the day. He looked back and saw a girl in Levi's arms, a girl who resembles Eren very much.

"Could it be..."

"THAT WAS YOUR SISTER ZEKE," Pieck said, "I WAS PLANNING ON CAPTURING HER BUT SHE'S TOO DAMN FAST."

"She had grown into a very beautiful woman. She must have sliced the back of his knee and slain the titans on the other side. She's also strong and smart," he thought to himself.

Seeing her made his resolve stronger. He needed to find and get Eren to carry out his plan.

There's a new reason for him to do this, they can give their sister the life that they both wanted to live.

- EREN JAEGER -

He wanted to leave the fight and just cross that wall to find his sister. From all the explosions and the cries of agony, he wanted to know if his sister is still alive.

"EREN!" He heard Armin shout in his ear, "Bella-Neechan will be alright. Captain Levi is with her. We'll find her as soon as we can, but we have to find a way to get closer to Berthold while Reiner is down."

Right, Captain Levi is there. And for some reason, he observed that the Captain seemed to stay close to where his sister was or would be checking her whereabouts or assigned location.

"She'll be fine. Armin's right, we have to kill Berthold."

They racked their brains for ideas on how they can take down the Colossal Titan, but they were all out. Except for Armin.

They executed the plan but to Armin's expense.

He rushed to his aid, his whole body burnt from the heat emitted by the Colossal Titan.

"Dammit, Armin! You have to hold on!" He cried.

"EREN! MIKASA! Thank God you're alive! Where's Ar-"

"Nee-san, where's Captain Levi?! The serum can save Armin. He can devour Berthold. We can get him back!"

Levi was on their side and he was about to give the serum when Floch limped with a wounded Commander Erwin in his arms, "Captain Levi, please save the Commander!"

"No! It has to be Armin!"

"What makes you think that the Commander's life is not important?!"

"ARE YOU SAYING THAT ARMIN'S LIFE IS NOT IMPORTANT?!"

"DAMARE!" Bella shouted.

She knew how Levi is feeling right now. Armin is like her little brother and she desperately wanted him to pick Armin, but Erwin is also her friend, her mentor, and their Commander. And she knew how much he means to Levi.

However, Erwin walked up to her before they took on this mission.

"Bella, if anything happens, please don't revive me. Let me go in peace. Hange is your new Commander"

She placed a hand on Levi's tensed shoulders, "Levi, whoever you choose, I'm with you and I trust your judgment. You know Armin and... You know what Erwin wants."

Levi nodded at her and she turned her back to calm her brother & Mikasa, "We can't force him to do anything. I want him to choose Armin, he's our family, my younger brother... But Erwin is also our commander. Let's give him space to think about this.."

"Onee-san," Eren sobbed, "I can't lose Armin..."

She placed her hands softly on Eren's cheeks and wiped his tears, "I know. I know. I don't want to lose him, too," she held back her tears and held her ground for her younger brother. Without letting go of Eren, she gently grabbed Mikasa and wrapped an arm around her, guiding both of them away from Levi, Erwin, and Armin.

She looked at Jean, who nodded in understanding and swung across the building with Eren, as he's too disoriented to do anything.

She held Mikasa firmly and they followed Jean as they swung from one building to another.

As they heard a loud growl, they all looked towards the source and were all surprised to see a giant, long blonde-haired titan, devouring a pleading Berthold to spare his life.

She smiled sadly as she was certain that Erwin had the same conversation with Levi. He must have only told her in case Levi would be too stubborn to not let him go in peace.

But the sad part is the truth that they only delayed the passing of Armin. The same with her brother. They both have a couple more years to live.