Your Eren's bestfriend since kids. And since your parents died his parents toon care of you and Eren. But as he grew eighteen things took a dark turn, ever since he could turn into a titan he became a villain. But that was about to be an end. But his other friend armin talked to him. Asking him if he wanted to lose you, if he ever wanted for you to slip away from his grasp. He clenched his fists "No... I want... I want to be with her forever... I want her to love me and me only... I.. I only want her.."