Dragons V.S Vampires

My story that I wrote in reading and writing workshop. I can't remember the grade I got but I like this story. Wattpad erased this story I plan on rewritting this but when I have time and when I remember I need to.
Description:
Quinn is the Queen of the Dragon Kingdom. She is a fire dragon, which means her dragon form is red. Her enemy,Chloe, the Queen of the Vampire Kingdom, keeps on killing dragons. After a few dragons are killed Quinn decides to declare war on the vampires. Then Chloe's brother,David,and he also happen to be her right-hand man, comes to help Quinn and her friends defeat Chloe. After Quinn and her friends talk to him and to each other they let him help with planning the war. David and Quinn start to get closer. Then they go to war. A character dies at the end. Who is it?