A angels revenge

Prolog

Dear Readers , just so you know my first language isn't Englisch. I hope that i don't have to many Mistakes. And yeah, have Fun with my Story!
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The night in the Celestial Kingdom was cold and stormy ,when it happened. The thunder was loud and some thought  their flying kingdom could crash to the ground any minute. The islands were shaking and the Houses were burning. The people were running around in panik. You could hear the screams of agony and sorrow. A mother was screaming for her child , sobbing and crying she sat in front of her burning house.
„Don't you worry, Ma'am." A knight with golden armor stood behind her, his big white wings stretched out. „I will get youre child!" He flew of the ground and pulled his sword out. He charged through the window, holding his breath trying to see in the smoke. He goes through the house, everything was burning, pictures were lying on the ground. Keepsakes, memories, everything was lost to the flames and smoke. He ran through the rooms, hearing quiet breaths in a room. In it there was a Child, a little boy, cowering on the floor. As he looks at the child and pics him up, he couldn't help thinking about his own daughter.
His little Persephone, even though she's already 17 she was always going to be his little girl.
He pressed the child to his chest and ran outside.
Outside people were swarming around him, the mother couldn't express how thankful she was. But all he could do was wondering where the was King? He could stop this mess!
He looked around. The people were attended to by the other knights, he could go to the castle fast.
He flew to the castle, flying over the burning city and over the castle walls. As he entered the castle, he couldn't help but think it was to quiet . Where were the other knights? He ran through the halls.Suddenly he heard a scream in the distance. He froze, „The king..!", he muttered. He ran faster and jumped in the air to start flying. He knew it came from the throne  room. A slight panik grew in him as he made his way to the throne room. Finally he arrived, he pusched the doors open. Nothing could have prepared him for what he saw..
The king laid on the floor. A sword pierced his body. As his king saw him, he began to smile. „ Caelius my most trusted knight.  Please promise me something." Caelius could only give a small nod. „ Please tell everyone what happened on this faithful day never, NEVER let this day be forgotten. Promise me that and that you will always protect this kingdom, don't fall the way i have. Live for this kingdom and youre Daughter."
„Yes my King"
„Good"
The king coughed and soon every sign of live left him.
Soon after the knight brought the now dead king outside the city was still burning.
On that day, all mourned for their gracious King.