The Four Kids Of Celestia

One day celestia had two kids then had two other kids but she decided two of her kids needed to be the ultimate life form so she took them to have them become an android with alien DNA to wield the power of the chaos emeralds but what happens the three become tired of living in that hell hole but they come back 6 years later and the summer sun celebration happens but canterlot is also under attack and will they find love