You were a new(ish) homeworld gem, (you may choose which gem you are) and you didn’t like homeworld that much so you went to earth, the city you got to the fasted was a city called beach city. While you were walking around trying to get use to everything a teenaged looking boy noticed you and ran up to you

Steven: Whats up! I'm Steven Universe, I can tell your a crystal gem because uh.. The- Crystal is visible- BUT I WAS WONDERING what your doing on earth not looking evil?