Attack On Titan/Shingeki no Kyojin Imagines

Until we meet again (Brother!Erwin)

I got this idea back when I first gave into watching Attack On Titan (which was the 57th Expedition and for some reason I thought Erwin was older than he was, idk why)

Reader is female and Erwin's sister
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Eren and the others sat in the dining hall talking about the expedition that was happening tomorrow; Sasha looked up from her food, resting her chin on her palm letting out a small sigh

"Do you ever wonder who the woman in that painting is? I remember seeing the Levi Squad carrying it in earlier.."

"I heard she was the first commander ever in the Scout Regiment." Jean shrugged as he ate his soup and then they all began calling out their theories on who the mysterious woman was. In the painting she had long/short h/c, big e/c eyes, and a beautiful smile that made you feel calm and happy, and the words below read: Bis wir uns wieder treffen

"Hey, you little shits how about you just ask us who she is." Levi barked as he walked in, Hange trailing closely behind him, and the two respectfully walked up and touched the Scout emblem on her jacket

"Bonsoir _______." He murmured with a small salute

"Beautiful as always _______." Hange whispered with a smile and a bow before walking over to the table where Levi sat down at, by his squad

"So...um, who is she?" Eren asked awkwardly

"Squad Leader ________ Smith, a brilliant and skilled soldier. Any of you would be lucky if you're even half as good as her. She has more kills, solo and team than anyone in the Scout Regiment." Levi spat narrowing his eyes at the newbies

"She's Erwin's..." Eren pressed curiously

"Sister. Adopted actually, her parents are presumed dead as she was only a toddler and Erwin found her and brought her home and she became his sister," Hange explained with a smile and looked at the painting "Erwin joined first, but as always it wasn't long before little _______ followed. She was top of her class, wanted by every Military branch, but thankfully she chose the Scout's. She was assigned to Commander Shadis' squad first, and was humanity's second strong, after Squad Leader Mike naturally. She quickly rose through the ranks and was assigned to train the newbies, and after a year in the Scout's, became a Squad leader herself...."

Erwin couldn't help but chuckle as he watched his sister with the new Scout's, how kind she was to those who actually tried, but was stern and cold with the rest who goofed off

"You behave like this outside of these walls and you'll die. So unless you'd like to become a Titan's snack I suggest you pay attention to what I'm teaching you." She said in a matter of fact way, and that scared them into submission like she'd have no problems tossing their corpses to the titans or into just some hole

"She's good with them." Mike commented as the two walked along the brick path, large pillars caused the scene to flash before them like one of Hange's 'slides' that flipped through various photos and documents at the push of a button

"She is...and they respect her as well." The two watched the girl proudly and how she taught them tactics to surviving in battle. Most young soldiers never understood why someone who was known for agility and titan killing numbers was teaching them that it was better to run than to risk their life to kill a titan, and it wasn't until they saw the casualties on their first expedition that they understood. ________ cried herself to sleep after every expedition, she hated seeing these people die, and that was usually what inspired her killing spree on titans, even if it put herself in danger. They were all perched atop branches one day, when the young woman broke her leg, she'd gotten Levi's new, young squad to safety with the help of Moblit and Hange and she watched as her own squad was torn to pieces