Eren Jeager was your college roommate and childhood best friend. You two have known each other since first grade so one could say you have an unbreakable bond.

He knows you well, inside and out, just like the back of his hand. You couldn't hide stuff from him even if you wanted to. He's such a teasing bastard but hey, he's your teasing bastard, isn't he?

And you wouldn't have it any other way.