He was the egoistic person that only can be calm and good when he with you and only you can make him feel better. Everytime when he's fighting, only you can calm him down and everyone will call for u to settle down the fight.

One day, Eunseok is fighting at the hallway, everyone panic and call you but you didn't pick up your phone. One of the student calm him down but he push the student away.

Eunseok: "Get away you stupid!"