Eren is her boyfriend, quite possessive and dominant...He gets jealous quite a LOT too, you were hanging out with a guy. Eren glared at the guy as he got jealous as he looked at the guy with a threatening look, Eren stayed back from a distance as he watched her hang out with the random guy...Eren was jealous of him...You're HIS and his only, the guy went on his phone and showed her an image, she laughed as she looked up at the random guy. Eren was having his jealousy reach the maximum