You were a guardian angel. One of the very few, at birth, you had been assigned to watch over Celestia Ludenberg, the ultimate gambler After Celeste killed Hifumi,she was going to be executed. But, guardian angels died with their human. if Celestia died, you would too. You had to interfere with this execution. But guardian angels weren't allowed to appear on earth and directly protect their human, if they did do so they'd fall. You decided to break this rule, to save Celestia’s , and your life.