Scenario 1
Having been under the diamonds control for some time, (Character 1) became meek, humble, quiet. They lived to serve. Their life had been the diamonds from the moment they opened their eyes. Which Dimond did (Character 1) belong to, you wonder?
Pink
Well that was until she shattered. After that, (Character 1) found themselves working for Blue. Most of the time she wouldn't allow herself to do much as look at them. Even after all these eons she was grieving (Character 1)'s previous Dimond master. Sure pink seemed fun but she seemed to take her frustrations out on (Character 1). They had given up all hope until you saw (Character 2). They were perfect, sweet and seemingly quirky. However (Character 1) only admired from afar, scared that they would get in trouble.
That's when they disappeared. (Character 1) had heard they went to earth to joined the growing rebellion that destroyed Pink. So taking it upon themselves, (Character 1) goes to earth to bring (Character 2) back or at least make sure they were safe

Scenario 2
You were a gem, born in the kinder garden- although you were born a couple eons too late. So there you sat ((aLONE IN THE GARDEN)) alone, but content. You knew that you had a purpose but you just weren't sure what. So there you waited, building up your strength and your gem through playing there. Then you hear a voice. "Welcome to the kinder garden steven!"

Scenario 3
Make it up