Fairy Tail: Azura the blue fire dragon slayer

Every year on the tenth day of the seventh month natsu, gildarts and mirajane go to the top of the mountain near natsus house they made a memorial for natsus sister azura who left on this day 12 years ago (counting 7 years on tenrou) she left to try to get stronger and promised natsu that she would be back in one year but she didnt come back but natsu found her and she is in danger and needs his help.
I DO NOT OWN FAIRY TAIL I ONLY OWN THE CHARACTERS I MADE UP