Armin Arlert

You have been a cadet at the Survey Corps headquarters for two years. In addition to training and classes on titans and the operation of the omni-directional mobility gear, you must go to the library every day to organize the books; every cadet performs their duty to keep the barracks clean and tidy, per Captain Levi's orders.
As you put some books back in their place, Armin, a boy known for being skilled at planning strategies and being part of one of the best groups in the barracks, approaches you timidly.
"Excuse me, by any chance, do you have a book there with a worn-out brown cover? It's my book and I left it on the table while I went to the bathroom; when I returned, I couldn't find it, so I guess you took it by mistake..." he puts a hand to his head and scratches his hair nervously, awaiting your response