Su×mlp
Moon Diamond
nicknamed luna
one of the rulers of the universe, once made a big fuss and was imprisoned because the territory they was assigned was too small.
When they came out, they found that a new diamond had been born, and they liked to get along with the small diamonds best, because it was still young and simple, and heten agreed with their own thoughts.
In fact, they knew that he would be imprisoned through a sapphire, but they， didn’t believe that he would be so irrational, nor did he believe that celestia would be so cruel to them

this is based on the yellow diamond