Akatsuki no Yona x angelWarrior!Female Reader (on hold)

Once a upon a time, there was a girl called (Y/N). She was an angel. An angel that specialise in fighting and healing as well as control over water (water bending XD). She was also incredibly smart as well as her heavenly looks, she only had one downfall, & that was being too clumsy for her own good.
Despite all this, she is undergoing her final assessment to be a professional warrior angel.
She has been handed to the care of the four dragons from a distant land for the said assessment. These dragons then spoke to her, giving her task. There were three rules
1. Not to expose her identity unless absolutely necessary.
2. Do not tell one side what you know about the other while with either side.
And finally, the last rule, the most important one
3. Do not fall in love with any humans

If all three rules are broken she will become a fallen angel.