When Eren first sees the small figure curled into himself, unmoving on the swing, he thinks it's a hallucination. It is impossible, because the Corporal is supposed to be his superior. He is supposed to be more experienced, more refined, more mature. But now, Eren is staring at that familiar face, posture... On a chil...
Every day without fail, just before dusk sets in, Eren sits on the top of the great Wall Maria. He draws the things his disturbed mind conjures up, and then folds them into a paper airplanes to send out, believing they'll reach the one who owns his heart, wherever he's gone... ~ Canonverse. Warning: mild manga spoiler...