Eren: Eren it only three weeks older then you, so you two are pretty much the same age but that doesn't stop Eren from being so much less mature then you.
Armin: Armin is roughly eight months older then you. You can tell the difference in age by how smart he is compared to you but you try and make it up by being a better fighter. Not that its a competition or anything.
Levi: (for this story please think of Levi as being 20)
Levi is 5 years older then you and as they say age is just a number. You love him with all your heart and so does he you. You complete each other, you are likr two sides of the same coin. The both of you have become a better version of yourselves after meeting each other and you keep each other in check and safe.
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Attack on Titan
FanfictionArmin Levi Eren Jean Erwin Connie Preferences Whats not to love?