Eon is a timekeeper. They watch over timelines and won't hesitate to delete unstable timelines. They did their job as a timekeeper seriously. They didn't do jokes. They would not laugh at your jokes. Eon was created only to fulfill the job as the timekeeper from the very beginning. Whenever Eon goes to mortals world, they freeze the time so no one knows what happened and only a fellow being like them won't get freeze.
