You and Eren are siblings, and it was always you and him, you, him, Armin and Mikasa. Even the eventual fall of your home and family you stuck to Eren the most and followed him, even joining the Survey Corps.

You were sent on a mission with a squad that Eren had no part in, Eren was worried but when he’s heard news that most of your squad got wiped out, he was worried you were gone as well, till you finally returned, banged up but alive. He could only feel relieved. Going up to you and wrapping you in a hug.

I was so worried about you, you can not die on me, I won’t allow for that. he spoke showing his protective side the most in the way he hugged and looked at you.